algebra word problem

Question

Xavier wants to order CDs online. Each CD costs $17.50 and shipping is $4. He only has $90 to spend. Write an inequality to represent the situation. How many CDs can he buy without exceeding his $90 limit. Justify your answer mathematically.

Be sure to write and solve an inequality.

Write a statement that tells how many CDs he can buy.

Answer 1

x = (90-4)/17.5

= 86/17.5

= 172/35 = at most 4, almost 5

if he buys 4, he pays 4(17.5)+4 = $74 and has $16 left over, almost but not enough to buy a 5th CD