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math

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can you check if i did these 3 problems right or not:
-5 (a+2)
i got: -3

simplify:
5 (x+2)
i got: 3

simplify:
(y-3) (-4)
i got: 12

  • math -

    If you don't know what the unknowns a, x and y are, you cannot calculate a numerical value.

    I think you misinterpreted the problem. Just simplify as follows:

    -5 (a+2) = -5a -10
    5 (x+2) = 5x + 10
    etc

  • math -

    thats what i thought i needed to know what a x and y were? but it was on my test and i got it wrong. now i have to correct but i don't know how. heres how instruction on test are:
    find the products:
    -5 (a+2)

    answer choices were:
    a) -5a -3
    b) -5a +10
    c) -5a +2
    d) -5a -10
    i don't know which is correct



    the other 2 problems were not multiple choice. just
    simplify:
    5(x+2)


    (y-3)(-4)

  • math -

    find the products:
    -5 (a+2)

    answer choices were:
    a) -5a -3
    b) -5a +10
    c) -5a +2
    d) -5a -10
    i don't know which is correct

    When you multiply a negative by a positive, the product is negative.

    5(x+2) = 5x + 10

    (y-3)(-4) = -4y + 12

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