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2 September, 22:16

Use a = 8 and b = 24 to work out the value of these expressions. b) ab c) b/a d) (a + b) ^2

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  1. 2 September, 22:37
    0
    b. 192

    c. 3

    d. 1,024

    Step-by-step explanation:

    We know that a=8 and b=24, so we can substitute 8 in for a and b in for 24 in each expression.

    b. ab

    a*b

    a=8

    b=24

    8*24

    Multiply 8 and 24

    192

    ab=192

    c. b/a

    b/a

    b=24

    a=8

    24/8

    Divide 24 by 8

    3

    b/a=3

    d. (a+b) ^2

    a=8

    b=24

    (8+24) ^2

    Add inside the parentheses first.

    (32) ^2

    Solve the exponent. 32^2 is the same as 32*32, which is equal to 1,024

    1,024

    (a+b) ^2=1,024
  2. 2 September, 22:41
    0
    Step-by-step explanation:

    a * b = 8 * 24 = 192

    b : a = 24 : 8 = 3

    (a+b) ^2 = a^2 + 2 * a * b + b^2 = 8^2 + 2 * 8 * 24 + 24^2

    (a+b) ^2 = 64 + 384 + 576 = 1024
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