Question

Andy has $310 in his account. Each week, w, he withdraws $30 for his expenses. Which expression could be used if he wanted to find out how much money he had left after 8 weeks?

30 points?

Answer 1

$70.

Explanation:

$30x8(w)=$240

He will have taken out (t) $240 of his starting amount (s) after 8 weeks (w):

$310(s)-$240(t)=$70.

He will have $70 left after 8 weeks.

Answer 2

310 - 3w

310 - 3(80) = $70

Explanation:

310 - 30w

w = 8

310 - 30(8)

310 - 240

= 70