Question

Suppose that 15 inches of wire costs 90 cents.

At the same rate, how much (in cents) will 8 inches of wire cost?

Answer 1

48c

Explanation:

if 15 → 90c

then 8 → xc

cross multiply

90 × 8=720

15 × x= 15x

720=15x

divide Both sides by 15

720/15= X

X= 48

therefore, 8 inches cost 48c