Using the t-distribution, the critical value needed is: t = 2.2622.
How to find the critical value for the t-distribution?The critical value is found using a calculator, with two parameters:
The confidence level.The number of degrees of freedom, which is one less than the sample size.For this problem, we have a confidence level of 95% and 10 - 1 = 9 df, hence the critical value is t = 2.2622.
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The sum of two numbers is -6. One number is 14 more than the other one. Find the numbers.
Answer:
The two numbers are -10 and 4
Step-by-step explanation:
[tex]x+y=-6\\y=14+x\\\\x+(14+x)=-6\\2x+14=-6\\2x=-20\\x=-10\\\\x+y=-6\\-10+y=-6\\y=4[/tex]
A given triangle has vertices at (-3, 1) (2, 4) and (5, -3). If the triangle were rotated 360 degrees clockwise, the new coordinates would be:
A dentist was making note of her upcoming appointments with different aged patients and
the reasons for their visits.
Patients under 18
Patients 19-60
Patients over 60
Regular cleaning Broken tooth
Submit
5
3
3
2
6
2
What is the probability that a randomly selected appointment is not with a patient 19-60 or is
not for a broken tooth?
Simplify any fractions.
Probability that a randomly selected appointment is with patients over 60 years old and is for a regular cleaning = (5/21)
The probability of an event is calculated as the number of elements in that event divided by the total number of elements in the sample space.
For this question, we are told to find the probability that a randomly selected appointment is with patients over 60 years old and is for a regular cleaning.
Number of patients that are over 60 years and are for regular cleaning = 10
Total number of patients = 2 + 8 + 6 + 4 + 10 + 12 = 42
Probability that a randomly selected appointment is with patients over 60 years old and is for a regular cleaning = (10/42)
= (5/21)
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Can someone help me please
(a) The given system of equation as an augmented matrix is [tex]\left[\begin{array}{cccc}1&3&0&150\\0&1&0&250\\-1&-1&1&400\end{array}\right][/tex];
(b) For the given augmented matrix, the system of equations is
-5x-6y-4z=400;
y+z=100;
-3x-3y-2z=150;
A "system-of-equations" is a set of two or more equations which contain multiple variables. The solution to the system of equations is the set of values for the variables that satisfy all the equations in the system.
An "Augmented-Matrix" is a way to represent a system of linear equations in a concise and organized manner. It is obtained by writing the coefficients of the variables and the constants in each equation in a rectangular array, with each row representing an equation.
Part(a) : The system-of-equations is given as :
x + 3r +0m = 150
0x + r + 0m = 250
-x - r + m = 400,
We see that the first column of the matrix will have 1, 0, -1,
the second-column will have 3, 1, -1 ;
the third-column will have 0, 0, 1.
So, the Augmented Matrix is represented as : [tex]\left[\begin{array}{cccc}1&3&0&150\\0&1&0&250\\-1&-1&1&400\end{array}\right][/tex].
Part(b) :
The augmented-matrix is given as : [tex]\left[\begin{array}{cccc}-5&-6&-4&400\\0&1&1&100\\-3&-3&-2&150\end{array}\right][/tex],
In this matrix, the terms in the "first-column" will be multiplied by variable"x";
the terms in the "second-column" will be multiplied by variable"y"; and
the terms in the "third-column" will be multiplied by variable"z";
The term sin the "fourth-column" represents the output value.
So, "system-of-equation" will be represented as : -5x - 6y - 4z = 400;
0x + y + z = 100;
-3x - 3y - 2z = 150.
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A jewlary shop sells 240 necklaces in a month 180 of the necklaces were sold in a via the shops website the rest were sold in a high street shop .
Work out the ratio of online sales to shop sales
Give ur answers in its simplest form
What is the apparent solution set for the system of equations:
x ^ 2 + 3x - 2;
- x ^ 2 + 2x + 4
A) {(- 3.5, 0) , (-1.2, 0), (0.5, 0), (3.3, 0)}
B) {(0, 2), (1.5, - 4.25)}
C) {(- 2, - 4), (1.5, 4.75)}
D) {(0, 4), (1, 5)}
There are no apparent solutions that satisfy both equations.
We have,
The system of equations is:
x² + 3x - 2 = 0
-x² + 2x + 4 = 0
To find the solutions, we can solve each equation separately:
x² + 3x - 2 = 0
This equation can be factored as:
(x + 2)(x - 1) = 0
Setting each factor equal to zero gives:
x + 2 = 0
x = -2
And,
x - 1 = 0
x = 1
-x² + 2x + 4 = 0
This equation does not factor easily, so we can use the quadratic formula:
x = (-b ± √(b² - 4ac)) / (2a)
For this equation, a = -1, b = 2, and c = 4.
Plugging in the values into the quadratic formula:
x = (-2 ± √(2² - 4(-1)(4))) / (2(-1))
x = (-2 ± √(4 + 16)) / (-2)
x = (-2 ± √20) / (-2)
Simplifying further:
x = (-2 ± 2√5) / (-2)
x = 1 ± √5
Now,
let's check which of these solutions satisfies both equations:
For x = -2:
(-2)² + 3(-2) - 2 = 4 - 6 - 2 = -4 ≠ 0
-(-2)² + 2(-2) + 4 = -4 - 4 + 4 = -4 ≠ 0
x = -2 does not satisfy both equations.
For x = 1:
1² + 3(1) - 2 = 1 + 3 - 2 = 2 ≠ 0
-(1)² + 2(1) + 4 = -1 + 2 + 4 = 5 ≠ 0
x = 1 does not satisfy both equations.
For x = 1 ± √5:
We can substitute these values into the equations, but it can be seen that they will not satisfy both equations either.
Therefore,
There are no apparent solutions that satisfy both equations.
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Which graph has the same end behavior as f (x) = StartFraction 10 x cubed + x squared + 3 Over 2 x squared + 1 EndFraction?
On a coordinate plane, a line goes through (negative 2, negative 10), (0, 0), and (2, 10).
On a coordinate plane, a graph approaches the x-axis in quadrant 2, increases up to (0, 10), and then curves down and approaches the x-axis in quadrant 1.
On a coordinate plane, a parabola opens up. It goes through (negative 2, 8), has vertex (0, 1), and goes through (2, 8).
The function with the same end behavior as f(x) = (10x³ + x² + 3)/(2x² + 1) is given as follows:
On a coordinate plane, a line goes through (-2, -10), (0, 0), and (2, 10).
What is the end behavior of a function?The end behavior of a function refers to how the function behaves as the input variable approaches positive or negative infinity.
The function for this problem is given as follows:
f(x) = (10x³ + x² + 3)/(2x² + 1)
As we are looking for the end behavior, we look at the terms with the highest exponent, hence:
f(x) = 10x³.
Then the end behavior is given as follows:
As x -> - ∞, 10(-∞)³ -> -∞.As x -> ∞, 10(∞)³ -> ∞.Hence the function with the same end behavior is the increasing line, which is given by the first option.
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John borrowed $4,300.00 for 8 days at an annual simple interest rate of 13.75%. What is the amount of interest will John have to pay at the end of the loan?
John will have to pay $12.24 in interest at the end of the loan.
To calculate the amount of interest John will have to pay at the end of the loan, we can use the formula for simple interest:
Interest = Principal * Rate * Time
Given:
Principal (P) = $4,300.00
Rate (R) = 13.75% per annum
Time (T) = 8 days
First, we need to convert the rate from an annual percentage to a daily rate. Since there are 365 days in a year:
Daily Rate = (Rate / 100) / 365 = (13.75 / 100) / 365 = 0.0003767
Now we can calculate the interest:
Interest = Principal * Rate * Time
= $4,300.00 * 0.0003767 * 8
= $12.24
Therefore, John will have to pay $12.24 in interest at the end of the loan.
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who can help me solve this pls need help
Answer:
Step-by-step explanation:
1+3=4
4x4=16
10/2=5
16-5=11
answer is 11
5. (6 pts pts) The displacement of a spring vibrating in damped harmonic motion is given by
y = 4e-3t sin(2πt)
Find the times when the spring is at its equilibrium position (y = 0). '
The times when the spring is at its equilibrium position (y = 0) are t = 0, 1/2, 1, 3/2, ... and so on.
To find the times when the spring is at its equilibrium position (y = 0), we can set the displacement equation equal to zero and solve for t:
[tex]4e^{(-3t)[/tex] sin(2πt) = 0
Since the product of two factors is zero if and only if at least one of the factors is zero, we have two cases to consider:
4[tex]e^{(-3t)[/tex] = 0
This equation has no solution since [tex]e^{(-3t)[/tex] is always positive and nonzero.
sin(2πt) = 0
The sine function is zero at integer multiples of π.
So, we can set 2πt equal to integer multiples of π:
2πt = 0, π, 2π, 3π, ...
Solving for t in each case, we get:
t = 0, 1/2, 1, 3/2, ...
Therefore, the times when the spring is at its equilibrium position (y = 0) are t = 0, 1/2, 1, 3/2, ... and so on.
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At a conference of educators, there ore 189 people total, and 128 are teachers. If the rest are principals, then how many principals are present?
Answer:
61 principals
Step-by-step explanation:
189 total - 128 teachers = 61 principals
Zara's car depreciates at a rate of 14% per year.
By what percentage has Zara's car depreciated after 5 years?
Give your answer to the nearest whole number.
NO SPAM.
Answer:
53%
Step-by-step explanation:
You want to know the depreciation of car value after 5 years if it is 14% per year.
MultiplierThe multiplier of value each year is ...
1 + growth rate = 1 + (-14%) = 0.86
When the value has been multiplied by that 5 times, it has been multiplied by ...
0.86^5 ≈ 0.4704
This represents a change in value from the original value of ...
0.4704 -1 = -0.5296 = -52.96% ≈ -53%
Zara's car has depreciated by 53% after 5 years.
<95141404393>
need help on this math question
The expression which gives the number of months passed in terms of p is √300 -0.5p
Subject of formulaWe make t the subject of the formula in the expression
p = 600 - 2t²
subtract 600 from both sides in other to isolate 2t²
p - 600 = 600 - 2t² - 600
p - 600 = -2t²
Rearrange the equation
2t² = 600 - p
Divide both sides by 2 in other to isolate t²
2t²/2 = 600/2 - p/2
t² = 300 - 0.5p
Take the Square root of both sides in other to isolate t
√t² = √300 - 0.5p
t = √300 - 0.5p
Hence, the correct expression which gives the number of months t in terms of price p is t = √300 - 0.5p
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Volume of Cone ___ mm3?
The volume of the cone is 301. 44mm³
How to determine the valueFirst, we need to know the formula
the formula that is used for calculating the volume of a cone is expressed as;
V = πr²h/3
Such that the parameters are;
V is the volume r is the radiush is the height of the coneSubstitute the values, we have;
Volume = 3.14 × 6² × 8/3
Multiply the values, we have;
Volume = 904.32/3
Divide the values
Volume = 301. 44mm³
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Solve for y
Finally, solve the proportion for y.
y/8 = 10/y
y = √ [?]
M
Enter the square root NOT simplified.
=
The square root of y is not simplified and can be represented as:
y = √([tex]2^4 \times[/tex] 5) or y = 4√5.
To solve the proportion y/8 = 10/y for y, we can cross-multiply:
y [tex]\times[/tex] y = 8 [tex]\times[/tex]10
This simplifies to:
[tex]y^2[/tex] = 80
To solve for y, we can take the square root of both sides of the equation:
[tex]\sqrt{y^2[/tex] = √80
Since the square root of [tex]y^2[/tex] is simply y, we have:
y = √80
The square root of 80 can be further simplified by breaking it down into its prime factors. Since 80 can be expressed as 2 [tex]\times[/tex]2 [tex]\times[/tex]2 [tex]\times[/tex]2 [tex]\times[/tex]5, we can simplify the square root:
y = [tex]\sqrt(2 \times 2 \times 2 \times 2 \times 5)[/tex]
Therefore, the square root of y is not simplified and can be represented as:
y = [tex]\sqrt{(2^4 \times 5)[/tex] or y = 4√5.
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Answer:
[tex]y = \sqrt{80\\} =4\sqrt{5}[/tex]
Step-by-step explanation:
how do I change 1/4 to a percentage .
Answer: You divide it, get your answer, move the decimal point to the right twice, and that's you're percent.
Step-by-step explanation:
1/4=.25
.25 > 25%
Answer:
The answer is 25%
Step-by-step explanation:
To change decimal to percentage multiply by 100
1/4×100%
=25%
Please help I don’t understand thank you have a blessed day
By evaluation, the values of the rational function are f(11) = - 1 / 12 and f(- 2) = 1, respectively.
How to evaluate a rational function
In this problem we find the case of a rational function that must be evaluated at two different x-values: x = 11, x = - 2. The procedure is summarized below:
Write the entire expression.Substitute on x with the given value.Simplify the expression by algebra properties.Now we proceed to present the complete procedure:
f(11) = 11 / (11 + 1) - 1
f(11) = 11 / 12 - 1
f(11) = 11 / 12 - 12 / 12
f(11) = (11 - 12) / 12
f(11) = - 1 / 12
f(- 2) = (- 2) / (- 2 + 1) - 1
f(- 2) = - 2 / (- 1) - 1
f(- 2) = 2 - 1
f(- 2) = 1
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what is an equation in point-slope form of the line shown in the graph, using the point (-2,-1)
The equation of the line in point-slope form, using the point (-2, -1), is: y + 1 = -2(x + 2)
How to Write the Equation of a Line in Point-slope Form?The equation of a line in point-slope form is given by y - y₁ = m(x - x₁), where (x₁, y₁) represents a point on the line and m represents the slope.
Given:
Slope (m) = rise/run = -2
Point (-2, -1)
Substituting the given slope and point into the equation, we have:
y - (-1) = -2(x - (-2))
y + 1 = -2(x + 2)
Therefore, the equation of the line is: y + 1 = -2(x + 2).
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find the area of each figure pls
Answer:
Step-by-step explanation:
1 = 20cm
2 = 0.56cm^2
3 = 77.5m2
The following table displays the number of sofas sold in a furniture store during certain months of the year.
Based on these data, the correct statement is B. The mean best describes the data.
What is the mean?The mean is one of the measures of central tendency.
The mean is also described as the average.
The average or mean is the quotient of the total data value divided by the number of data items.
Furniture Store Sofa Sales
January 255
February 234
March 263
April 229
May 248
Total sales = 1,229
The number of months of sales = 5
Mean = 245.8 (1,229 ÷ 5)
Thus, using the mean, we can conclude that the average sales from Januar to May were 245.8.
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Question Completion:The following table displays the number of sofas sold in a furniture store during certain months of the year.
Furniture Store Sofa Sales
January 255
February 234
March 263
April 229
May 248
Based on these data, which statement is correct?
A. There are outliers.
B. The mean best describes the data.
C. The median best describes the data.
D. The measure of variability that best describes the data is the IQR, 27.5.
Use the given data to make a box-and-whisker plot.
5, 4, 16, 21, 10, 6, 15
Answer:
To make a box-and-whisker plot, we first need to order the data from smallest to largest:
4, 5, 6, 10, 15, 16, 21
Next, we can find the median, which is the middle value of the ordered data set. In this case, the median is 10.
Then, we can find the lower quartile (Q1) and the upper quartile (Q3). The lower quartile is the median of the lower half of the data set, and the upper quartile is the median of the upper half of the data set. To find Q1 and Q3, we can split the data set into two halves:
4, 5, 6, 10 and 15, 16, 21
The median of the lower half is (5+6)/2 = 5.5, and the median of the upper half is (16+21)/2 = 18.5. Therefore, Q1 = 5.5 and Q3 = 18.5.
Now we can draw the box-and-whisker plot. The box represents the middle 50% of the data, with the bottom of the box at Q1 (5.5), the top of the box at Q3 (18.5), and the line inside the box at the median (10). The whiskers extend from the box to the smallest and largest values inthe data set that are not outliers. To determine whether there are outliers, we can use the following formula:
Outlier = Q1 - 1.5 * (Q3 - Q1) or Q3 + 1.5 * (Q3 - Q1)
Plugging in the values, we get:
Outlier = 5.5 - 1.5 * (18.5 - 5.5) = -13.25 or Outlier = 18.5 + 1.5 * (18.5 - 5.5) = 37.25
Since there are no values in the data set that are less than -13.25 or greater than 37.25, there are no outliers.
Therefore, the box-and-whisker plot for the given data is:
| 4
___|___
| |
| |
| 5.5 |-----
| | |
| | |
|------------| 10 |
| | |
| 15.5 |------
| | |
___|___
| 21
The box spans from Q1 (5.5) to Q3 (18.5), with the median line inside the box at 10. The whiskers extend from the box to the minimum value of 4 and the maximum value of 21, since there are no outliers.
Hope this helps!
Raina wants to buy a new house but needs money for the down payment. Her parents agree to lend her money at an annual rate of 6%, charged as simple
interest. They lend her $7000 for 5 years. She makes no payments except the one at the end of that time.
Answer the following questions. If necessary, refer to the list of financial formulas.
(a) How much total interest will Raina have to pay?
(b) What will the total repayment amount be (including interest)?
$
X
a. Raina will have to pay a total of $2100 in interest.
b. The total repayment amount, including interest, will be $9100.
How to Calculate Total Interest?To calculate the total interest and total repayment amount, we can use the formula for simple interest:
Simple Interest = Principal * Rate * Time
(a) Total interest:
Principal = $7000
Rate = 6% per year
Time = 5 years
Total Interest = Principal * Rate * Time
= $7000 * 0.06 * 5
= $2100
(b) Total Repayment Amount = Principal + Total Interest
= $7000 + $2100
= $9100
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2
Select the correct answer from each drop-down menu.
Triangle ABC is shown in the coordinate plane. It is translated 6 units left and 4 units down. Then it is dilated by a scale factor of 3 centered about the
origin. Complete the statements.
-6 -4
v.
6
4-
2-
lo
-2-
-4-
-6-
The translation of triangle ABC
A
2
с
6
B
Reset
The dilation of triangle ABC
Next
For the transformations of the triangle, we have that:
1. The translation of triangle ABC preserves side lengths and angles.
2. The dilation of triangle ABC preserves angles but not side lengths.
Hence the correct options are, respectively, C and B.
A translation involves shift left, shift right, shift down, or shift up, meaning that just the coordinates of the figure change, not the angles or the side lengths,
1. The translation of triangle ABC preserves side lengths and angles.
For a dilation, the coordinates of the vertices are multiplied by a constant, hence the side lengths change while the angles remain constant, thus:
2. The dilation of triangle ABC preserves angles but not side lengths.
Hence the correct options are, respectively, C and B.
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If someone can explain this to me that would be amazing, I have a college algebra final tomorrow and I am rly confused. I don’t know how wide to make it, if someone can explain this I will give 100 points and brainliest
hey here is my algebra 13 homework, can someone please help! heres screenshot. QUICK PLSS
The graph of the given exponential function f(x) = 4(0.5)ˣ + 2 is g(x) = 5(1/6)ˣ + 2
Hence, the correct option is A.
An exponential function is a mathematical function of the form f(x) = aˣ, where "a" is a positive constant known as the base, and "x" is the independent variable. The exponential function is defined for all real values of x, and the output values of the function are always positive.
The exponential function is characterized by its unique property of having a constant rate of change with respect to its own value. This means that the function increases (or decreases) by a constant factor each time the independent variable is increased by a fixed amount.
For the given exponential function g(x) = 5(1/6)ˣ + 2 as the graph of f(x) and g(x) are same.
Hence, the correct option is A.
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What is the area of the shaded region?
Answer:
80 mm²
Step-by-step explanation:
Even for slanted triangles, the area is base x half height! The base is 10 mm, half the height is 8 mm, so the area is 8x10=80 mm.
A triangle has sides with lengths of 3 miles, 4 miles, and 6 miles. Is it a right triangle
Yes, the given triangle is a right triangle.
We have,
This can be determined by applying the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.
Now,
In this case, the squares of the side lengths are:
3² = 9
4² = 16
6² = 36
If the sum of the squares of the two shorter sides (9 + 16 = 25) is equal to the square of the longest side (36), then the triangle is a right triangle.
Thus,
In this case, since 25 is indeed equal to 36, the triangle with side lengths 3 miles, 4 miles, and 6 miles is a right triangle.
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The graph shows an exponential function relating the balance in
an investment account to the time in years.
What does the y-intercept represent?
O
the time it takes the account to reach its maximum
value
O the maximum value of the account
O the initial balance of the account
O the amount the account increases by each year
Account balance (5)
1600
1400
1200
1000
800
600
The value of the y-intercept represent,
⇒ the amount of the account increases by each year.
We have to given that;
The graph shows an exponential function relating the balance in an investment account to the time in years.
Now, From graph we have;
The value of the y-intercept represent,
⇒ the amount of the account increases by each year.
Thus, value of the y-intercept represent,
⇒ the amount of the account increases by each year.
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Tanya flew 2,299 miles the first year on the job. She flew 3,831 miles the second year. Tanya flew 1,510 more miles the third year than the first and second years combined. How many miles did Tanya fly the third year?
Please help me!!
Answer: 7,640
Step-by-step explanation: Because we know that she flew 2,299 the first year and 3,831 the second, we can add them together to get: 6,130. It says that she flew 1,510 more miles the third year than the first and second combined. Therefore: 6,130 + 1,510 = 7,640
Can someone answer and provide an explanation for these problems? Find the midpoint of the line segment with the given endpoints.
52) The midpoint of the line segment is (-0.5, 9).
53) The midpoint of the line segment is (3, -8.5).
52) To find the midpoint of the line segment with endpoints (8,9) and (-9,9), we can use the midpoint formula. The midpoint formula states that the coordinates of the midpoint (x, y) are the average of the corresponding coordinates of the endpoints.
For the x-coordinate:
(x₁ + x₂) / 2 = (8 + (-9)) / 2 = (-1) / 2 = -0.5
For the y-coordinate:
(y₁ + y₂) / 2 = (9 + 9) / 2 = 18 / 2 = 9
Therefore, the midpoint of the line segment is (-0.5, 9).
53) To find the midpoint of the line segment with endpoints (8,-10) and (-2,-7), we apply the same process using the midpoint formula.
For the x-coordinate:
(x₁ + x₂) / 2 = (8 + (-2)) / 2 = 6 / 2 = 3
For the y-coordinate:
(y₁ + y₂) / 2 = (-10 + (-7)) / 2 = -17 / 2 = -8.5
Hence, the midpoint of the line segment is (3, -8.5).
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