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maw [93]
2 years ago
13

Enter the missing values in the area model to find 8(8k + 9)

Mathematics
2 answers:
Digiron [165]2 years ago
7 0
64k for the two eights and 9. The answer to the bottom is 64k+72.

Vika [28.1K]2 years ago
3 0
8(8k+9) = 64k+72 , hope this helped :)
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A general contractor is constructing a building that requires a concrete foundation that is to be 20 feet by 12 feet and 4 inche
ikadub [295]

First we calculate the volume of the foundation:

Volume (V) = 20 ft * 12 ft * 4 in (1 ft / 12 in)

V = 80 ft^3

 

Since the cost is in cubic yard (yard^3) so convert:

V = 80 ft^3 * (1 yard^3 / 27 ft^3) = 2.963 yard^3

 

So the total cost is:

cost = ($125 / yard^3) * 2.963 yard^3

<span>cost = $370.37</span>

7 0
3 years ago
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Can you help me on both of this problems
AlekseyPX

Answer:

9. Option D, 2(3x + 5) and 6x + 10

10. 9 + 3 (10÷2) - 5² = -1

Hope this helps!

7 0
3 years ago
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What is the result of a dilation of scale factor 3 centered at the origin of the line 2y + 3x=10?? PLEASE HELP PLEASEEEEEEEEE
maks197457 [2]

Given:

The equation of a line is:

2y+3x=10

The line is dilated by factor 3.

To find:

The result of dilation.

Solution:

The equation of a line is:

2y+3x=10

For x=0,

2y+3(0)=10

2y+0=10

y=\dfrac{10}{2}

y=5

For x=2,

2y+3(2)=10

2y+6=10

2y=10-6

2y=4

Divide both sides by 2.

y=\dfrac{4}{2}

y=2

The given line passes through the two points A(0,5) and B(2,2).

If the line dilated by factor 3 with origin as center of dilation, then

(x,y)\to (3x,3y)

Using this rule, we get

A(0,5)\to A'(3(0),3(5))

A(0,5)\to A'(0,15)

Similarly,

B(2,2)\to B'(3(2),3(2))

B(2,2)\to B'(6,6)

The dilated line passes through the points A'(0,15) and B'(6,6). So, the equation of dilated line is:

y-y_1=\dfrac{y_2-y_1}{x_2-x_1}(x-x_1)

y-15=\dfrac{6-15}{6-0}(x-0)

y-15=\dfrac{-9}{6}(x)

y-15=\dfrac{-3}{2}x

Multiply both sides by 2.

2(y-15)=-3x

2y-30=-3x

2y+3x=30

Therefore, the equation of the line after the dilation is 2y+3x=30.

3 0
2 years ago
What are the domain and range of the function?
amm1812
The answer would be B
8 0
3 years ago
Taylor’s work is incorrect. Explain the error she made.
Vlada [557]

Answer:

she put the numbers in parentheses

Step-by-step explanation:

4 0
3 years ago
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