Question

7-9(8+5f) with f = 7

Answer 1

-380

Explanation:

7-9(8+5f) with f = 7

substitute the variable with the number

7-9(8+5 x 7)

do the parenthesis first using P.E.M.D.A.S.

7-9(8+35)

7-9(43)

7 - 9 x 43

7 - 387

-380

Answer 2

-380

Explanation:

7 - 9(8 + 5f)

7 - 9(8 + 5(7))

7 - 9(8 + 35)

7 - 9(43)

7 - 387

-380

Best of Luck!