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2 years ago

9

4 (5+2x)-5=-3 (5y-7)+5y

1 answer:

anzhelika [568]2 years ago

7 0

I could solve this if the x was maybe a y, or there was no x. I am down to this:
8x = -20y + 6

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The surface area of a cube is equal to the sum of the areas of all sides. The surface

mrs_skeptik [129]

Answer:

96

Step-by-step explanation:

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2 years ago

Find the measure of <3.

miss Akunina [59]

Measure of angle 3 is 31

7 0

3 years ago

The solutions to the equation f(x) = g(x) are -2 and 1. If f and g are graphed on the same coordinate plane, which statement mus

solniwko [45]

Answer:

c

they will both have to intersect since you have a negative and positive number. Hope it helps.

Step-by-step explanation:

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2 years ago

-5x-18y=-28 and -10x+9y=-11 solve elimination

Dmitry [639]

Answer:

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

$x=2,\:y=1$

Step-by-step explanation:

Given the equations

$-5x-18y=-28$

$-10x+9y=-11$

solving the system of the equation by elimination method

$\begin{bmatrix}-5x-18y=-28\\ -10x+9y=-11\end{bmatrix}$

$\mathrm{Multiply\:}-5x-18y=-28\mathrm{\:by\:}2\:\mathrm{:}\:\quad \:-10x-36y=-56$

$\begin{bmatrix}-10x-36y=-56\\ -10x+9y=-11\end{bmatrix}$

$-10x+9y=-11$

$-$

$\underline{-10x-36y=-56}$

$45y=45$

$\begin{bmatrix}-10x-36y=-56\\ 45y=45\end{bmatrix}$

solve 45y=5 for y:

$45y=45$

$\frac{45y}{45}=\frac{45}{45}$

$y=1$

$\mathrm{For\:}-10x-36y=-56\mathrm{\:plug\:in\:}y=1$

solve $-10x-36\cdot \:1=-56$ for x:

$-10x-36\cdot \:1=-56$

$-10x-36=-56$

Add 36 to both sides

$-10x-36+36=-56+36$

$-10x=-20$

$\frac{-10x}{-10}=\frac{-20}{-10}$

$x=2$

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

$x=2,\:y=1$

5 0

2 years ago

∠A and ∠B are vertical angles with m∠A=x and m∠B=5x−80 .<br><br> What is m∠A ?

nirvana33 [79]

20 degrees
vertical angles are equal, so 5x-80=x
solve for x and you get 20

4 0

3 years ago