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3 years ago

11

Math help, thanks for the help. i'm very great full

1 answer:

rodikova [14]3 years ago

4 0

4x +28 and 68 are vertical angles and are equal.

Set them to equal each other to solve for x:

4x +28 = 68

Subtract 28 from each side:

4x = 40

Divide both sides by 4:

x = 40/4

x = 10

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If two lines are perpendicular, their slopes are negative reciprocals.<br> A. True<br> B.False

Ainat [17]

A. If the slopes of two lines are negative then the reciprocals, of the lines are perpendicular.

8 0

3 years ago

Read 2 more answers

Mrs drew wants to build a square sandbox with an area of 169 square feet. What is the total length of wood mrs. Drew needs to ma

Bezzdna [24]

Area of sandbox = 169 square feet

Area of square with side 'x' is given by the formula = $x^2$

We have to determine the total length of wood Drew needs to make the sides of the sandbox.

Total length of wood required would be equal to perimeter of sandbox.

Let 'a' be the side of the square sandbox.

So, Area of sandbox = 169

$a^2 = 169$

$a = \sqr{169}$

a = 13 feet

Total length of wood required to make sides of the sandbox = Perimeter of the square sandbox = $4 \times a$

= $4 \times 13$

= 52 feet.

Therefore, 52 feet of wood is required to make the sides of the square sandbox.

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3 years ago

3y+10x−54=0<br> 5y−2x−34=0<br>

Korvikt [17]

Answer:

8y + 8x + 0

Step-by-step explanation:

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3 years ago

Look at the system of equations below.

Paul [167]

Answer:

$\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}$

$x=2,\:y=-1$

Step-by-step explanation:

Considering the system of the equation

$\begin{bmatrix}y=-2x+3\\ 4x-3y=11\end{bmatrix}$

$\mathrm{Subsititute\:}y=-2x+3$

$\begin{bmatrix}4x-3\left(-2x+3\right)=11\end{bmatrix}$

$\mathrm{Isolate}\:x\:\mathrm{for}\:4x-3\left(-2x+3\right)=11$

$4x-3\left(-2x+3\right)=11$

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$10x-9=11$

$10x-9+9=11+9$

$10x=20$

$x=2$

$\mathrm{For\:}y=-2x+3$

$\mathrm{Subsititute\:}x=2$

$y=-2\cdot \:2+3$

$y=-1$

$\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}$

$x=2,\:y=-1$

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3 years ago

3+2\cdot7^2-4\cdot63+2⋅7 <br> 2<br> −4⋅6

Hoochie [10]

Answer:

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2 years ago