Question

Suppose that 17 inches of wire costs 51 cents.

At the same rate, how many inches of wire can be bought for 39 cents?

Answer 1

Explanation:

Find unit rate of cents per inch:
51 c / 17 in = 3 cents per inch

39 cents / 3 cents /inch = 13 inches

Answer 2

13 Inches

Explanation:

Take the total cost and divide that by the number of inches of wire:

51/17 = 3 cents per inch of wire.

After that take the total cost of what you are looking for and divide it by the cost per inch, this gets you 13 inches.

39/3 = 13 Inches