Question

If 30 pencils cost $15, how much does 45 pencils cost?

Answer 1

45 pencils would cost $22.50.

Step-by-step explanation:

To find out how much 45 pencils cost, we can use a proportion based on the cost of 30 pencils. Let's set up the proportion:

30 pencils / $15 = 45 pencils / x

Cross multiplying, we get:

30x = 45 * $15

Simplifying, we have:

x = (45 * $15) / 30

x = $22.50

Therefore, 45 pencils would cost $22.50.