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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  1. Please post the question.

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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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