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5 March, 13:17

Refer to Expression 1 and Expression 2.

Expression 1

6·7-3²·9+4³

Expression 2

5+4·2+6-2·2-1

(a) What is the value of Expression 1?

(b) Insert parentheses in Expression 2 so that it has a value of 19. Then show why your expression has a value of 19.

I'd very much appreciate if you showed your work.

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Answers (1)
  1. 5 March, 13:41
    0
    Expression 1 is 25

    6*7-3^2*9+4^3

    First simplify all the exponents to get 6*7 - 9 * 9 + 64 and then multiply the two numbers to get 42 - 81 + 64 and just add = 25

    For expression 2, if you put the parantheses around (5+4) * 2+6-2*2-1, it'll be 19

    (5+4) * 2+6-2*2-1

    9*2+6-2*2-1

    18+6-4-1

    24-5

    19

    Remember order of operations
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