Select the correct answer. Identify the expression equivalent to 4(x + x + 7) - 2x + 8 - 4 by substituting x= 1 and x = 2.

A. 6x + 11
B. 3(x + 7)
C. 2(3x + 16)
D. 3x + 16​

Answer:

A, B, F

- The radius of the circle is 3 units

- The center of the circle lies on the x-axis

- The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9

Step-by-step explanation:

The first option is correct because the standard equation of the circle is:

[tex](x - 1)^{2} + {y}^{2} = 9[/tex]

making the radius equal to 3.

The center is at (-1,0), therefore it lies on the x-axis.

And lastly, the last option is correct because both options have the radius of 3.

See below for the solution to the questions

The given parameters are:

Area = 138

a = 4x - 1

b = x - 4

Height = 12

The area is calculated as:

Area = 0.5 * (a + b) * height

So, we have:

0.5 *(4x - 1 + x - 4) * 12 = 138

This gives

5x - 5 = 23

Add 5 to both sides

5x = 28

Divide by 5

x = 5.6

Recall that:

a = 4x - 1 = 4 * 5.6 - 1 = 21.4

b = x - 4 = 5.6 - 4 =  1.6

Hence,  the short base length is 1.6 meters and the long base length is 21.4 meters

The sides are given as:

x = 22

y = 24

z = 25

The largest angle always opposite the largest side.

This means that the largest angle is Z

The radius is given as:

r = 29

The circumference is calculated as:

[tex]C = 2\pi r[/tex]

So, we have:

[tex]C = 2\pi *29[/tex]

Evaluate

C = 182.21

Hence, the circumference is 182.21 inches

The measure of the arc is given as:

[tex]\theta = 69^o[/tex]

The angle LIK is calculated as:

[tex]m\angle LIK = \frac{\theta}2[/tex]

So, we have:

[tex]m\angle LIK = \frac{69^o}2[/tex]

Evaluate the quotient

[tex]m\angle LIK = 34.5^o[/tex]

Hence, the measure of the angle is [tex]m\angle LIK = 34.5^o[/tex]

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Step-by-step explanation:

in a number like 125,734,016

the right most position has the weight 10⁰ = 1

so, 6×1 = 6.

the second right most position has the weight 10¹ = 10.

so, 1×10 = 10

the third right most position has the weight 10² = 100.

so, 0×100 = 0

the 4th right most position has the weight 10³ = 1000.

so, 4×1000 = 4,000

the 5th right most position has the weight 10⁴ = 10000.

so, 3×10000 = 30,000

the 6th right most position has the weight 10⁵ = 100000.

so, 7×100000 = 700,000

the 7th right most position has the weight 10⁶ = 1000000.

so, 5×1000000 = 5,000,000

the 8th right most position has the weight 10⁷ = 10000000

so, 2×10000000 = 20,000,000

and so on.

as we can see, the 2 (the 8th most position from the right or the second position from the left) has the value of 20,000,000.

The length of the rectangular box is 0.67 feet

The given parameters are:

Length = ??

Width = 1.0 ft

Height = 1.5 ft

Volume = 1.0 ft^3

The volume is calculated as:

Volume = Length * Width * Height

Substitute the known values in the above equation

1 = Length * 1 * 1.5

Evaluate the product

1 = Length * 1.5

Divide both sides by 1.5

Length = 0.67

Hence, the length of the rectangular box is 0.67 feet

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Answer:

12.11069457

Step-by-step explanation:

You start by using sin(48) = 9/x
You then multiply both sides by x to give you

xsin(48) = 9

you then divide both sides by sin(48) to get x by itself

x = 9/sin(48)

this gets you

x=12.11069457

The distance from the base of the tree to the tallest would be 14.21 cm

X1 = 8 feet

y1 = 16 feet

x2 = 11 feet

y2 = 9 feet

To proceed with the solution we have to

We have to solve for the shorter tree

[tex]\sqrt{(y2 -y1)^2 + (x2-x1)^2} \\\\= \sqrt{9-0^2 + 11-0^2}[/tex]

= 9² + 11²

= √81 +121

= 14.21

√8² + 16²

= √64 +256

= 17.89

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Considering the given tree diagram, there is a 0.5 = 50% probability of an investor choosing either stocks or bonds from portfolio C.

A probability is given by the number of desired outcomes divided by the number of total outcomes.

At each node, the sum of the probabilities is of 1, hence:

0.2 + 0.3 + Z = 1.

Z = 0.5.

There is a 0.5 = 50% probability of an investor choosing either stocks or bonds from portfolio C.

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Answer:

a) Perfect square.

b) 9

Step-by-step explanation:

The given numbers are perfect squares.

64 = 8*8

49 = 7*7

36 = 6*6

25 = 5*5

16 = 4*4

So, the next number will be 3 *3 = 9

See below for the converse, inverse, and contrapositive of the statement

The statement is given as:

If Brielle drives at exactly 30 mi/h, then she travels 10 mi in 20 mins

The speed is calculated as:

Speed = Distance/Time

So, we have:

Speed = 10 mi/20 mins

This gives

Speed = 10 mi/1/3 h

Speed = 30 mi/h

The converse

To do this, we simply switch the hypothesis and the conclusion

So, the converse is:

If Brielle travels 10 mi in 20 mins, then she drives at exactly 30 mi/h

The above statement is true

The inverse

To do this, we simply negate the hypothesis and the conclusion

So, the inverse is:

If Brielle did not drive at exactly 30 mi/h, then she did not travel 10 mi in 20 mins

The above statement is false

The contrapositive

To do this, we simply negate the hypothesis and the conclusion, and then switch them

So, the contrapositive is:

If Brielle did not travel 10 mi in 20 mins, then she did not drive at exactly 30 mi/h

The above statement is false

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Answer:

[tex]5.5[/tex]

Step-by-step explanation:

Mean:

The mean of a data set is commonly known as the average. You find the mean by taking the sum of all the data values and dividing that sum by the total number of data values. The formula for the mean of a population is

[tex]\mu = \frac{{\sum}x}{N}[/tex]

The formula for the mean of a sample is

[tex]\bar{x} = \frac{{\sum}x}{n}[/tex]

Both of these formulas use the same mathematical process: find the sum of the data values and divide by the total. For the data values entered above, the solution is:

[tex]\frac{55}{10} = 5.5[/tex]

19 sweets are lefted.

Lets simplify the problem,

Maximum no. of bag filled by 4275 sweets

Through Simple Division we get,

4275/28 ~=152

Therefore , there is 4256 sweets in 152 bags

Therefore, 4275-4256=19 sweets are left

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The equation of the circle with a center (-5, -6) and a radius of 5 is (x + 5)² + (y + 6)² = 25.

The standard equation for writing the equation of a circle is: (x - h)² + (y - k)² = r².

Given the following:

Center (-5, -6) = (h, k)

Radius = 5 = r

Plug in the values into the formula

(x + 5)² + (y + 6)² = 5²

(x + 5)² + (y + 6)² = 25

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The measurement of the angle is 15° (if initial angle is 0°).

Turning Through One-degree Angles

An angle is said to have an angle measure of n degrees if it rotates across n one-degree angles. Since turning through one degree means making an angle of one degree, every time you take a turn of one degree, you rotate through one degree more. Thus, turning through n one-degree angles give rise to an angle of n degrees.

Measurement of the Angle

It is given that the angle has turned through 15 one-degree angles. Thus, the angle will turn through 15°.

Let us assume the initial angle to be x°.

Then, the new angle after 15 one-degree turns would be (x+15)°

If initial angle, x = 0°, the measurement of the angle formed is 15°.

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Mean = $ 4. 72

Median = $ 4. 5

Mode = No mode

MAD = $ 4. 8

IQR = $ 0. 5

Measure of center = $ 4. 5

Measure of variability = $ 2. 50

Given the data;

$3.50, $4.25, $6, $4.75, $5.80, $4

Mean = sum of data/ number of data values

Mean = [tex]\frac{3. 50 + 4. 25 + 6 + 4. 75 + 5. 80 + 4}{6}[/tex]

Mean = $ 4. 72

Median is the number in the center when the data is arranged in an ascending order

$3. 50, $4, $4. 25, $4. 75, $5. 80, $6

Median = [tex]\frac{4. 25 + 4. 75}{2}[/tex]

Median = $ 4. 5

Mode is the number with the highest repeats.

From the given data, none of the numbers was repeated.

Thus, there is no mode.

MAD, mean absolute deviation = |data value - mean|

MAD = [tex]|(3. 50 - 4. 72) + (4. 25 - 4. 72) + (6 - 4. 72) + (4. 75 - 4. 72) + (5. 80 - 4.72) + (4- 4. 72) |[/tex]

MAD = [tex]1. 22 + 0. 47 + 1. 28 + 0. 03 + 1. 08 + 0. 72[/tex]

MAD = $ 4. 8

IQR, interquartile range = Quartile 3 - quartile 1

IQR = 4. 75 - 4. 25

IQR = $0. 5

Note that  the mean and median are the most common measures of center.

A measure of variability is a single number that is  used to describe the spread of a data set

The measure of the center best for the data is the median = $4. 5

Measure of variability = range = highest value - lowest value = $6 - $3. 50 = $2. 50

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Answer:

They can type 825 words in 25 minutes.

Step-by-step explanation:

First, we need to find how many words they can type per minute. To do that, we need to divide 495 by 15.

[tex]495 \div 15 = 33[/tex]

Now, we know how many words per minute, and the question is how many words they can type in 25 minutes. So to find our answer, we need to multiply 33 by 25, since 33 is how many words in one minute.

[tex]33 \times 25=825[/tex]

So now we know our answer: 825 words in 25 minutes.

From rectangular component, the distance of the port north of the reef is 25.9808 km.

It is given that a fishing trawler sails 30 km from port on a bearing of 120° until it reaches a submerged reef.

Thus the direction of the fishing trawler is given to be 120° with respect to the movement of the trawler.

Resolving the direction by the horizontal and vertical components, we get

The horizontal component of distance is |30*cos(120°)| = 15 km

The vertical component of distance is |30*sin(120°)| = 25.9808 km

Thus as we have to find the north direction or the vertical component, the distance is 25.9808 km.

Therefore, from rectangular component, the distance of the port north of the reef is 25.9808 km.

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Answer:

Option D

Step-by-step explanation:

The triangle ABJ is equitorial

So area

Then mBJ is a arc which is 1/6th of circle

Area.

So area of unshaded region

Answer:

[tex]\textsf{d.} \quad r^2\left(\dfrac{\pi}{6}- \dfrac{\sqrt{3}}{4}\right)[/tex]

Step-by-step explanation:

To find the area of the unshaded region, subtract the area of ΔJGB from the area of sector JGB.

The measure of an arc is equal to its corresponding central angle measure.  Therefore, the central angle of sector JGB is 60°.

As the two sides of ΔJGB adjacent the central angle are the radii of the circle (and therefore equal in length), ∠GJB = ∠GBJ.  

Interior angles of a triangle sum to 180°.  Therefore, all interior angles of ΔJGB are 60° which makes it an equilateral triangle.

Area of an equilateral triangle:

[tex]\sf A=\dfrac{\sqrt{3}}{4}a^2 \quad \textsf{(where a is the side length)}[/tex]

As the side length of the given equilateral triangle is the radius (r):

[tex]\implies \sf Area\:of\:triangle=\dfrac{\sqrt{3}}{4}r^2[/tex]

To find the area of the sector, first convert degrees to radians by multiplying the degrees by π/180 :

[tex]\implies 60^{\circ}=60 \times \dfrac{ \pi}{180}=\dfrac{\pi}{3}\:\:\sf radians[/tex]

Area of a sector of a circle

[tex]\textsf{A}=\dfrac12 r^2 \theta \quad \textsf{(where r is the radius and the angle }\theta \textsf{ is in radians)}[/tex]

Substituting the angle in radians, the area of the sector is:

[tex]\implies \sf A=\dfrac{1}{2}r^2\left(\dfrac{\pi}{3}\right)[/tex]

[tex]\implies \sf A=\dfrac{\pi}6}r^2[/tex]

Area of the unshaded region:

[tex]\begin{aligned}\textsf{Area of unshaded region} & =\textsf{Area of sector} - \textsf{Area of triangle}\\\\& = \dfrac{\pi}{6}r^2 - \dfrac{\sqrt{3}}{4}r^2\\\\& = r^2\left(\dfrac{\pi}{6}- \dfrac{\sqrt{3}}{4}\right)\end{aligned}[/tex]

Therefore, the solution is option D.

Answer:

Step-by-step explanation:

2=27

3=27

5=27

1=126

4=126

a. The rate of change = -25/month

b. Kamal's account balance reduces by 25$ per month.

c. To find the $725.

d. Kamal's opening balance or initial deposit.

e. The linear equation is: A = -25n + 725.

The rate of change (m) = change in y/change in x.

a. The rate of change (m) = change in A / change in n = (700 - 650)/(1 - 3) = -25/month.

b. -25 dollar per month means every month, Kamal's account balance reduces by 25$

c. To find the initial value (b), substitute m = -25 and (7, 550) = (n, A) into A = nm + b:

550 = 7(-25) + b

550 = -175 + b

550 + 175 = b

b = 725.

Initial value is: 725.

d. The initial value, $725, is Kamal's opening balance or initial deposit.

e. To write the linear equation, Substitute m = -25 and b = 725 into A = nm + b:

A = -25n + 725

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The statement that is true about the domain and range of each function is; A) Both the domain and range of the transformed function are the same as those of the parent function.

We are told that the graph of f(x) = |x| is reflected across the y-axis. Thus;

|-x| = x

Now, the function is translated to the left by 5 units and so the transformed function is; g(x) = |x + 5|

Thus, from the graph, we get;

Domain of both functions is the set of all real numbers.

Range of both functions is the set {y|y ≥ 0}

Thus, we conclude that Both the domain and range of the transformed function are the same as those of the parent function.

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Answer: [tex]\triangle XYZ \sim \triangle GFH[/tex] by AA.

Step-by-step explanation:

Finding the third angle in triangle XYZ,

[tex]m\angle YXZ=180^{\circ}-77^{\circ}-48^{\circ}=55^{\circ}[/tex],

Thus, [tex]\triangle XYZ \sim \triangle GFH[/tex] by AA.

The expression is simplified to x

g(x) = (x ^ 3 - 9x)/(x ^ 2 - 6x + 9)

First, we simplify the numerator

= [tex]\frac{x (x^2 - 3^2)}{x^2 - 6x + 9}[/tex]

Now, let's solve the quadratic equation in the denominator

= [tex]\frac{x(x^2 - 3^2)}{x^2 - 3x - 3x + 9}[/tex]

= [tex]\frac{x(x^2 - 3^2)}{x(x-3) - 3(x - 3)}[/tex]

= [tex]\frac{x(x - 3) (x -3)}{(x -3) ( x-3)}[/tex]

Divide the like factors

= x

The answer is x

Thus, the expression is simplified to x

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The factorized form of the given function, f(x) = 2x⁴ - x³ - 18x² + 9x, is, f(x) = x(2x - 1)(x + 3)(x - 3), and the complete statement is, From left to right, function f has zeros at x = -3, x = 0, x = 1/2, and x = 3.

In the question, we are asked to find the factors of the function f, and complete the given statement.

The function f, given to us is:

f(x) = 2x⁴ - x³ - 18x² + 9x.

To factor the function, we first group the terms as follows:

f(x) = (2x⁴ - 18x²) - (x³ - 9x).

Now, we take common terms out of the group as follows:

f(x) = 2x²(x² - 9) - x(x² - 9).

Now, we again take common terms, as follows:

f(x) = (2x² - x)(x² - 9),

or, f(x) = x(2x - 1)(x + 3)(x - 3).

This is the factored form of the given function, f.

The statement given to us is:

From left to right, function f has zeros at x = _, x = _, x = _, and x = _.

To find the zeroes of the function, we equate the factorized form to 0.

x(2x - 1)(x + 3)(x - 3) = 0.

By zero-product rule, the zeroes are at:

x = 0,

2x - 1 = 0, or, x = 1/2,

x + 3 = 0, or, x = -3,

x - 3 = , or, x = 3.

Arranging these in ascending order, the zeroes are at: -3, 0, 1/2, and 3.

Thus, the factorized form of the given function, f(x) = 2x⁴ - x³ - 18x² + 9x, is, f(x) = x(2x - 1)(x + 3)(x - 3), and the complete statement is, From left to right, function f has zeros at x = -3, x = 0, x = 1/2, and x = 3.

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For the complete question, refer to the attachment.

Answer: Edmentum/plato

Step-by-step explanation:

Answer:

factoring

Step-by-step explanation:

The time it took the rider to reach the ground level is 171.651seconds

Quadratic functions are functions that has a leading degree of 2.

Given the equation that represents  roller coaster’s height as shown

h = –0.025t^2 + 4t + 50

The coaster will reach the ground when h = 0

Substitute

0 = –0.025t^2 + 4t + 50

Factorize

On factorizing, the time it took the rider to reach the ground level is 171.651seconds

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Answer:

171.65 seconds

Step-by-step explanation:

did the test and got it right

The simplification of the expression (2x - 3)(5x⁴ - 7x³ + 6x² - 9) is 10x^5 - 29x⁴ + 33x³ - 18x² - 18x + 27

(2x - 3)(5x⁴ - 7x³ + 6x² - 9)

= 10x^5 - 14x⁴ + 12x³ - 18x - 15x⁴ + 21x³ - 18x² + 27

= 10x^5 - 14x⁴ - 15x⁴ + 12x³ + 21x³ - 18x² - 18x + 27

= 10x^5 - 29x⁴ + 33x³ - 18x² - 18x + 27

The simplified expression is 10x^5 - 29x⁴ + 33x³ - 18x² - 18x + 27

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Answer:

[tex]x^2+(y-3)^2=36\\[/tex] and [tex]x^2+(y+8)^2=36[/tex]

Step-by-step explanation:

So the general formula for a circle is usually represented as: [tex](x-h)^2+(y-k)^2=r^2[/tex] where (h, k) is the center of the circle and r is the radius of the circle.

Since the diameter is 12, the radius is going to be 6, because the radius is half the diameter. We now square that value (since it's squared in the equation), you get 36, which is going to be on the right side.

The last thing to know is since it's on the y-axis, that means h=0, since if h didn't equal 1, it would either be to the right or left of the y-axis. So the equation should look something like this: [tex]x^2+(y-k)^2=36[/tex] where k can be any real number.

So this gives you the two equations:
[tex]x^2+(y-3)^2=36\\[/tex] and [tex]x^2+(y+8)^2=36[/tex]

Answer: D. 12

Step-by-step explanation: The mode is the most popular number in a set of numbers. In this set, there are 3 sevens, 3 twelves, 2 nines, and 2 fifteens. If the mode is twelve, you need one more 12 because there are the same amounts of twelves and sevens. So that means the answer is 12!