i and iv are correct in a 45° - 45° - 90° triangle?|. The legs are congruentII. The length of the hypotenuse is twice the length of the shorter leg.
in 45 -45-90 triangle the legs are both 1 units in length and the hypotenuse is sqrt 2
sqrt2 ^2 = 1^2+1^2
this denotes our measurement is true
if the legs ofa right triangle are a and b and the hytponuse is c then
a²+b²=c²
lets say
a>b
so
longer leg is 4ft longer than shorter
a=4+b
hypotnuse is 8ft longer than shorter
c=8+b
teh equation in terms of b and solve
a²+b²=c²
subsitute
(b+4)²+b²=(b+8)²
b²+8b+16+b²=b²+16b+64
2b²+8b+16=b²+16b+64
minus (b²+16b+64) from both sides
b²-8b-48=0
what 2 numbers multiply to get -48 and add to get -8?
-12 and 4
(b-12)(b+4)=0
set equal to 0
b-12=0
b=12
b+4=0
b=-4
false, can't have negative length
b=12
so
a=4+b
a=4+12
a=16
c=8+b
c=8+12
c=2
shorter leg: 12ft
longer leg: 16ft
hypotonuse: 20ft
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Can a triangle have the sides 5'7 12?
It is not possible to construct a triangle whose sides are 5 cm 7 cm and 12 cm because the sum of two sides(5 cm and 7 cm) are equal to the third sides(12 cm). Two equal sides cannot form a triangle.
In the given question, we have to check that it is possible to construct a triangle whose sides are 5 cm 7 cm and 12 cm.
The sum of the two sides must always be greater than the third side in order to determine whether or not the given sides may form a triangle.
To check this we firstly add the 5 and 7.
7 + 5 = 12
12 = 12
Now we add 5 and 12
5 + 12 > 7
17 > 7
Now we add 7 and 12
7 + 12 > 5
19 > 5
It is not possible to construct a triangle whose sides are 5 cm 7 cm and 12 cm because the sum of two sides(5 cm and 7 cm) are equal to the third sides(12 cm). Two equal sides cannot form a triangle.
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The complete question is:
Can a triangle have the sides 5 cm 7 cm and 12 cm?
8x−5y=−11 determine the intercepts
The x and y-intercepts of the given equation of line 8x - 5y = -11 are (-11/8,0) and (0,11/5) respectively.
What are the x and y-intercepts of the given equation of line?Given the equation of line in the question;
8x - 5y = -11
To find the x-intercept, substitute in 0 for y and solve for x.
8x - 5y = -11
8x - 5(0) = -11
8x - 0 = -11
8x = -11
x = -11/8
Hence, the x-intercept is (-11/8,0)
To find the y-intercept, substitute in 0 for x and solve for y.
8(0) - 5y = -11
0 - 5y = -11
-5y = -11
y = -11 / -5
y = 11/5
Hence, the y-intercept is (0,11/5).
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Arvin is training for a race. He wants to bike:
between 35 and 41 miles a week,
either 3 or 4 days a week, and
the same number of miles each day.
What are two possible ways Arvin can complete his training plan?
Answer:
Two possible ways Arvin can complete his training plan are:
Biking 35 miles a week, 3 days a week, biking 11.67 miles per day.
Biking 41 miles a week, 4 days a week, biking 10.25 miles per day.
In the first option, Arvin bikes 35 miles a week, 3 days a week, which means he bikes 11.67 miles per day to achieve his goal.
In the second option, Arvin bikes 41 miles a week, 4 days a week, which means he bikes 10.25 miles per day to achieve his goal.
It is important to note that these are just examples, and there could be other options that Arvin can consider, as long as it meets his requirement of biking between 35 and 41 miles a week, either 3 or 4 days a week, and the same number of miles each day.
Step-by-step explanation:
Solve:
[tex]sin^2(2x+3)+cos^2(2x+3)=2x+3[/tex]
The solution of the trigonometric equation sin^2(2x+3)+cos^2(2x+3)=2x+3 is x = -1.
How to solve a trigonometric equation?Trigonometry is the branch of mathematics that deals with the relationship between ratios of the sides of a right-angled triangle with its angles
sin²(2x+3) + cos²(2x+3) = 2x + 3
Remember, the trigonometric identity, sin²θ + cos²θ = 1.
Thus, we can say sin²(2x+3) + cos²(2x+3) = 1. We now have:
sin²(2x+3) + cos²(2x+3) = 2x + 3
1 = 2x + 3
2x = 1-3
2x = -2
x = -2/2
x = -1
Therefore, the solution of the equation is x = -1
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What is the exponential form of 3?
Answer:The 3 in 103 is called the exponent. The expression 103 is called the exponential expression. base → 103 ←exponent
Step-by-step explanation:
How many years will it take for an investment to double if the rate is 6.75% and it is compounded monthly?
By solving an exponential equation, we can see that the investment will be doubled after 10.6 years.
How many years will it take for the investment to double?The investment can be modeled by the exponential equation:
P(x) = A*(1 + 6.75%/100%)^x
Where A is the initial value of the investment (the amount invested).
We can simplify this to get:
P(x) = A*(1 + 0.0675)^x
The investment will be doubled when:
2*A = A*(1 + 0.0675)^x
We want to solve this for x.
2 = (1 + 0.0675)^x
2 = (1.0675)^x
If we apply the natural logarithm in both sides:
ln(2) = ln((1.0675)^x)
ln(2) = x*ln(1.0675)
ln(2)/ln(1.0675) = x
10.6 = x
The investment will be doubled after 10.6 years.
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5. f(x) = 2x - 7 Ln x; 6. f(x) = 3x^2 + 4x - Inx^5; 7. y = -5t^2 +4-3
The derivatives of the given functions are 2 - 7/x, 6x + 4 - 5/x^4 Inx, -10t + 3 - 1/t Log t, and 6/x In 5 - 4x, respectively.
5. f'(x) = 2 - 7/x;
6. f'(x) = 6x + 4 - 5/x^4 Inx;
7. y' = -10t + 3 - 1/t Log t;
8. y' = 6/x In 5 - 4x
5. To find the derivative of the given expression, apply the chain rule. The derivative of 2x is 2, and the derivative of -7Ln x is -7/x. Thus, the derivative of the function is 2 - 7/x.
6. To find the derivative of the given expression, apply the chain rule. The derivative of 3x^2 is 6x, the derivative of 4x is 4, and the derivative of -Inx^5 is -5/x^4 Inx. Thus, the derivative of the function is 6x + 4 - 5/x^4 Inx.
7. To find the derivative of the given expression, apply the chain rule. The derivative of -5t^2 is -10t, the derivative of 4 is 0, and the derivative of -3t is -3. The derivative of Logt is 1/t Log t. Thus, the derivative of the function is -10t + 3 - 1/t Log t.
8. To find the derivative of the given expression, apply the chain rule. The derivative of 6In5x is 6/x In 5, and the derivative of -2x^2 is -4x. Thus, the derivative of the function is 6/x In 5 - 4x.
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x^2+x=3 then what is x^3-4x
By algebra properties, the values of algebraic expression x³ - 4 · x are - 3 and 0 for x² + x = 3.
How to derive the result associated to an algebraic expression
In this question we must derive the value of algebraic expression x³ - 4 · x based on the fact that x² + x = 3. First, determine the value of x by algebra properties:
x² + x = 3
x² + x - 3 = 0
x² + (2 - 1) · x + 2 · (- 1) = 0
x² + 2 · x - x - 2 = 0
x · (x + 2) - (x + 2) = 0
(x - 1) · (x + 2) = 0
x = 1 or x = - 2
The roots of x² + x = 3 are 1 and - 2.
Second, determine the values associated with the two roots found in previous step:
x = 1
y = x³ - 4 · x
y = 1³ - 4 · 1
y = 1 - 4
y = - 3
x = - 2
y = x³ - 4 · x
y = (- 2)³ - 4 · (- 2)
y = - 8 + 8
y = 0
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If you have a 30% increase, what percentage of the original amount do you have?
The original amount is (100%) if you have an increased by 30%
What is percentage increase?
Percentage increase is the difference between the final value and the initial value, expressed in the form of a percentage.
In the given question, the percentage increase can be calculated with the help of the percentage increase formula,
Percentage Increase = [(Final Value - Initial Value)/Initial Value] × 100
To get the original amount,
Just add the percentage increase to 100, divide 100 by it, then multiple by the final number to get the original number.
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What value(s) of b will cause 2x2 + bx + 128 = 0 to have one real solution? Select all that apply. A. b = 32 B. b = −50 C. b = −20 D. b = –32
The value of b can be -32 or +32 to ensure that the equation has only one true solution.
What is discriminant of the equation?The discriminant is the quadratic formula section behind the square root symbol: b2-4ac. The discriminant indicates whether there are two solutions, one solution, or none at all. The "discriminant" is the argument (that is, the contents) of the square root, which is the equation b2 4ac, because by utilizing its value, you may "discriminate" between (that is, determine the difference between) the various solution types.
Here,
The discriminant of the equation is ...
d = b² -4ac
d = b² -4(2)(128)
d = b² -1024
In order for there to be one real solution, we must have d=0. So ...
0 = b² -1024
1024 = b²
±√1024 = ±32 = b
The value of b can be -32 or +32 to cause the equation to have one real solution.
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Is 0 an exponential function?
0 is not an exponential function.
We know that the general form of exponential function f with base b is defined as:
f(x) = b^x
where b > 0 and b is not equal to 1
and x is any real number.
If it is negative b < 0, the function is undefined for -1 < x < 1.
If in an exponential function the base is less than zero, then it would make the function values complex for certain fractional values.
If the base of exponential function is 0 then function would create a graph which violates the properties / definition of exponential functions.
Also, we can not write 0 in exponential function form.
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Please please please help! 20+ points! Thank you :)
Answer:
CD = 27
Step-by-step explanation:
2(4x - 1) + 2(3x + 3) = 116
8x - 2 + 6x + 6 = 116
14x + 4 = 116
14x = 112
x = 8
3(8) + 3
= 24 + 3
= 27
A group of students was surveyed in a middle school class. They were asked how many hours they work on math homework each week. The results from the survey were recorded.
Number of Hours Total Number of Students
0 1
1 8
2 2
3 5
4 9
5 7
6 3
Determine the probability that a student studied for exactly 1 hour. Round to the nearest hundredth.
0.03
0.23
0.30
0.77
Question 15(Multiple Choice Worth 2 points)
(Experimental Probability MC)
A student randomly draws a card from a standard deck of 52 cards. He records the type of card drawn and places it back in the deck. This is repeated 20 times. The table below shows the frequency of each outcome.
Outcome Frequency
Heart 7
Spade 3
Club 6
Diamond 4
Determine the experimental probability of drawing a heart.
0.13
0.25
0.35
0.70
Answer:
For the first question, To determine the probability that a student studied for exactly 1 hour, we can use the formula:
P(X=1) = (number of students who studied for 1 hour) / (total number of students)
In this case,
P(X=1) = 8/30 = 0.27 (rounded to two decimal places)
So the probability that a student studied for exactly 1 hour is 0.27
For the second question, to determine the experimental probability of drawing a heart, we can use the formula:
P(Heart) = (number of times a heart is drawn) / (total number of draws)
In this case,
P(Heart) = 7/20 = 0.35
So the experimental probability of drawing a heart is 0.35
Therefore, the option 3 is the answer.
Step-by-step explanation:
Which statement best explains if the graph correctly represents the proportional relationship y = 0.5x? (4 points) A coordinate plane is shown. Points are graphed at 1 comma 0.5 and 4 comma 2. The points are joined by a line.
The correct statement is (A) the points on the line would indeed be a part of the equation y = 0.5x.
What are proportional relationships?Relationships between two variables that are proportional occur when their ratios are equal.
Another way to consider them is that in a proportionate relationship, one variable is consistently equal to the other's constant value.
The "constant of proportionality" is the name of this constant.
Observing the graph, the line traverses (0, 0). We obtain y=0.5(0)=0 if x=0.
Since this is the point's y-coordinate, it passes through this.
Y=mx+b, where m is the slope and b is the y-intercept, is the slope-intercept form equation for this line.
m=0.5 and b=0 in this equation.
This indicates that the slope is 0.5 or 1/2; as slope = rise/run, this indicates that the line rises one for every increase in the horizontal dimension of two.
This implies that starting from (0, 0), we would climb 1 and cross 2 to make the spot (2, 1).
When examining the graph, the line passes through this location.
We would then ascend 1 and cross over 2 once more to (4, 2). Once more, the line passes through this spot.
Therefore, the correct statement is (A) the points on the line would indeed be a part of the equation y = 0.5x.
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Complete question:
Which statement best explains if the graph correctly represents the proportional relationship y = 0.5x?
A. Yes, the points shown on the line would be part of y = 0.5x
B. Yes, all proportions can be shown on a graph of this line
C. No, the points shown would not be part of y = 0.5x
D. No, proportions cannot be represented on a graph
40-32 dived by 8+5-2
39
40-32÷8+5-2
40-4+3
40-1
39
c + –4c + 10 + –10
an
Answer:
-3c
Step-by-step explanation:
During photosynthesis, what is the path or flow of energy among biotic and abiotic parts of an ecosystem?
Answer:
-3c
Step-by-step explanation:
c+-4c+10+-10= c+-4c= -3c
A textbook store sold a combined total of history and math textbooks in a week. The number of history textbooks sold was three times the number of math textbooks sold. How many textbooks of each type were sold?
Answer:
not enough info
Step-by-step explanation:
Let h = number of history books.
Let m = number of math books.
"The number of history textbooks sold was three times the number of math textbooks sold."
h = 3m
"A textbook store sold a combined total of history and math textbooks in a week."
h + m = t
t = total number of books sold.
We have a system of equations:
h = 3m
h + m = t
Since we do not have a value for t, and we have a system of 2 equations in 3 variables, we cannot find the numbers of history or math books sold.
Pleader help, I’m so confused
Answer:
5•8-(4+2)=34
Step-by-step explanation:
because you need to change the order of operation
-3/7 is greater than -2/5
Answer: False
Step-by-step explanation:
-3/7 roughly equals -0.428
-2/5 equals -0.4
-0.4>-0.428
-2/5>-3/7
What is substitution Short answer?
Substitution is the name of the process in algebra which is used for swapping an algebraic letter for its value.
The substitution method is the algebraic method to solve different linear equations. In this method, the value of one variable from one of the equations is substituted in the other equation.
In substitution the following steps are used to solve an equation by substitution method:
Step 1. Simplify the given equation by removing the parenthesis.
Step 2. Solve one of the equations for any unknown value.
Step 3. Substitute step 2 result in the other equation.
Step 4. Now solve the equation which gets from step 3 obtained using elementary arithmetic operations.
Step 5. Finally, solve the final equation for the second variable.
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A cylinder has a height of 19 millimeters and a radius of 7 millimeters. What is its volume? Use ≈ 3.14 and round your answer to the nearest hundredth.
Step-by-step explanation:
[tex]volume \: of \: cylinder = \pi \: {r}^{2} h \\ volume = 3.14 \times {7}^{2} \times 19 \\ = 2923.34 \: millimetres[/tex]
50 POINTS!
INDUCTIVE/DEDUCTIVE ARGUMENT
Since the United States' Declaration of Independence was signed in the year 1776, it follows that the United States is over 200 years old.
Argument A is deductive and Argument B is inductive.
What is deductive and inductive argument ?Deductive reasoning uses broad premises to arrive at specific conclusions, while inductive reasoning starts with specific premises and draws general conclusions.
If the premises are valid, deductive reasoning's conclusions cannot be false. This is so because there is nothing in the conclusion that isn't already there in the premises. Yet, an inductively drawn conclusion goes beyond the information in the premises, unlike deductive reasoning.
Argument A is deductive because from the premise it is saying that the Grand Canyon was carved out by aliens from Jupiter, which is not sure.
Argument B is inductive because from the premise it is saying that Since the United States' Declaration of Independence was signed in the year 1776, it follows that the United States is over 200 years old, which is true.
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The complete question is:
INDUCTIVE /DEDUCTIVE ARGUMENT
Argument A: The Grand Canyon could not have been made by humans, so it follows that the Grand Canyon was carved out by aliens from Jupiter.
Argument B: Since the United States' Declaration of Independence was signed in the year 1776, it follows that the United States is over 200 years old.
help me cause its due today
The value of x is equal to 9 for the two-variable equation -2x - 7y = 17 when y is equal to -5.
Two variable equationA two-variable equation is an equation that has 2 variables, typically x and y
For the two-variable equation;
-2x - 7y = 17
we shall evaluate for the value of x when y = -5 as follows:
-2x - 7(-5) = 17
-2x + 35 = 17
subtract 35 from both sides of the equation
-2x = 17 - 35
-2x = -18
divide through by -2
x = -18/-2
x = 9
Therefore, 9 is the value of x when y is equal to -5 for the two-variable equation -2x - 7(-5) = 17.
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What are the explicit equation and domain for an arithmetic sequence with a first term of 3 and a second term of 5?
Group of answer choices
an = 3 + 2(n − 1); all integers where n ≥ 0
an = 3 + 6(n − 1); all integers where n ≥ 1
an = 3 + 6(n − 1); all integers where n ≥ 0
an = 3 + 2(n − 1); all integers where n ≥ 1
Note that the explicit equation and domain for an arithmetic sequence with a first term of 3 and a second term of 5 is n = 3 + 2(n − 1); all integers where n ≥ 1 (Option D)
What is an arithmetic sequence?Arithmetic progression or arithmetic sequence is a numerical series in which the difference between subsequent terms is constant. For example, the sequence 5, 7, 9, 11, 13, 15..
The first term of the arithmetic sequence is 3, followed by 5. Thus, the common difference is, 5-3 = 2. You use these values to the derived formulas for arithmetic progression. One of these formulas is
An = A1 + (n-1)d
where
An is the nth term in the sequence
A1 is the first term of the sequence
n is the total number of terms within the sequence
d is a common difference.
In this problem, A1 = 5 and d=2. Substituting to the equation,
An = 3 + (2)(n-1)
An = 3 + 2(n-1), where n should be more than 1. In order for it to become a sequence, it should contain more than one term.
Therefore, it is correct to appropriate an explicit equation and domain for an arithmetic sequence with a first term of 3 and a second term of 5 to be: n = 3 + 2(n − 1); all integers where n ≥ 1
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Function or not a function?
PLEASE HELP ME I NEED THIS DONE AS SOON AS POSIBLE
a. Liam wants to know how the function would need to change to reflect the amount of money the business will take in. Use this function to model a function for gross sales. (Gross sales are the total amount of money the flowers sell for.)
Type your response here:
b. Liam knows that his cost (c) in terms of the units of mums sold (x) can be modeled by the function Replace the variable x in this function with the function that gives the number of units sold (x) in terms of price p. What does this turn the function c into?
Type your response here:
c. Liam wants to calculate the profit his shop would earn from the sale of mums. He knows that it can be done by deducting the costs from the money that the store makes selling mums. Now that he has the functions for the cost and gross sales, can he subtract the function for cost from the function representing the gross sales to arrive at a function for profit? Why?
Type your response here:
d. Find the store’s profit function for selling mums by subtracting the function for cost from the function for gross sales. Consider pr(p) as the profit function.
Type your response here:
e. Is the profit function linear or quadratic?
Type your response here:
f. Liam wants to use the profit function to determine the range of prices at which he can sell mums and make a profit. How can he determine the price range?
Type your response here:
g. Use the quadratic formula to find the factors of the profit function you wrote.
Type your response here:
h. Using the factors you found in part g, find the zeros of the quadratic profit function.
Type your response here:
i. Liam needs to find the range of prices at which he can sell mums and make a profit. Based on the equation, what are the points between which he will earn a profit on his mums?
Type your response here:
j. Liam wants to determine the most profitable price point for the mums. Use the completing the square technique to find this price.
Type your response here:
k. Liam is interested in determining the maximum profit possible for the mums. Find the maximum profit corresponding to the most profitable price point.
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Task 2: A Boat Ride
Jake went on a riverboat tour. After returning from the tour, he was curious to know the speed at which the boat was going. During the tour, he was told that he would travel 10 miles upstream and then 10 miles downstream. He also knows that the river was flowing at a rate of 3 miles/hour and that the tour took about three hours.
The boat moved at a constant speed for the whole journey, although its actual speed varied with the current.
a. Jake wants to know the boat’s actual speed going upstream and actual speed coming downstream. If the boat was moving at a constant speed of x miles per hour, determine the boat’s relative speed in each direction.
Type your response here:
b. Was the time it took the boat to go upstream the same as the time it took to come downstream?
Type your response here:
c. Jake first reasoned that because the boat ride took 3 hours, it must have taken 1.5 hours to go upstream and 1.5 hours to go downstream. Thinking about it further, however, he realized that the ride upstream had to take longer than the trip downstream. What is the reason it took longer to travel one direction than the other?
Type your response here:
d. The time it took the boat to go upstream is U, and the time it took to come downstream is D. What is U + D?
Type your response here:
e. Jake knows that the relationship between distance (d), velocity (v), and time taken (t) is given by d = vt. Rewrite this equation for t.
Type your response here:
f. Using the equation you rewrote in part e, write an equation for the time taken for the upstream trip.
Type your response here:
g. Now construct an equation for the time taken for the downstream trip.
Type your response here:
h. Jake already has the equation U + D = 3, which represents the total time taken for the whole journey. Now that he has individual equations for U and D, he needs to combine these three equations to get a single equation. Construct a combined equation for U + D in terms of x, the constant speed at which the boat was going.
Type your response here:
i. Jake now has an equation with x as the only unknown variable. He needs to solve for x. Transform the equation you found in part h into a quadratic equation, and find the value of x, the constant speed at which the boat traveled.
Type your response here:
Answer::b.
Step-by-step explanation:
Each week, the price of oranges at the farmer's market increases by `20\%`.
Select all the equations that represent the relationship between the price of oranges last week, `x`, and the price of oranges this week, `y`.
The equation of the relationship between the price of oranges last week and this week is y = 1.2x
How to determine the equation that represent the relationship?From the question, we have the following parameters that can be used in our computation:
Price last week = x
Rate of increment = 20%
Price this week = y
Using the above as a guide, we have the following:
Price this week = Price last week * (1 + Rate of increment)
Substitute the known values in the above equation, so, we have the following representation
y = x * (1 + 20%)
Express as decimal
y = x * (1 + 0.2)
Evaluate the sum
y = x * 1.2
So, we have
y = 1.2x
Hence, the equation is y = 1.2x
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What is the value of −7 + (−12) + 81?
−100
−76
62
86
What does a correlation of r =- 0.89 indicate?
The magnitude of the correlation coefficient indicates the strength of the association. For example, a correlation of r = 0.9 suggests a strong, positive association between two variables, whereas a correlation of r = -0.2 suggest a weak, negative association.
How to interpret a correlation coefficient?
The statistical measure of how well changes in the value of one variable predict changes in the value of another is called a correlation coefficient. The value rises or falls together when the variables are positively linked.
Is r or r 2 the correlation coefficient?
The summary table in the Regression output contains the "R" value, which is the coefficient of correlation. The term "coefficient of determination" also applies to R square. To obtain the value of R squared, multiply R by R. In other words, the square of the coefficient of correlation is the coefficient of determination.
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NAFTA recognize the reality of today' economy - globalization and technology. Our future i not in competing at the low-level wage job; it i in creating high-wage, new technology job baed on our kill and our productivity. ~ John F. Kerry
The quote mentioned in the question was given by John F. Kerry who was a famous American personality, he was born on 11 December 1943.
Professionally he was an attorney and later became a politician and, diplomat and he currently serves as the first United States special presidential envoy for climate. He is a member of the Forbes family and the Democratic Party, and that he previously served as the 68th United States secretary of state .
Some of his other popular quotes are , "I saw courage both in the Vietnam War and in the struggle to stop it. I learned that patriotism includes protest, not just military service."
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