Algebra

Can someone please tell me how to solve this problem? Trying to help a teen who is staying with me with their homework, but I am clueless.

Thanks.

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bobpursley
2. Oops....sorry, I forgot to put the problem in.

-2y = 228 + 8x
10x + 11y = -64

Solve each system of equations using the substitution method.

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3. Put them in standard form:
8x+2y=-228
10x+11y=-64

Elminate a variable. I will pick x. Multiply the top equation by 10, the second equation by 8

80x+20y=-2280
80x+88y=-64*8

now subtract the second equation from the first..
-68y=-2280+64*8
and proceed to solve for y. Then, substitue back in the original equation, either one, and solve for x.

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bobpursley
4. x+y=-8 3x-y=-4

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5. what is 3 to the square root of 75 plus 2 to the square root of 5

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