Question

Marisa wants to buy a DVD player that runs for at least $150. She already saved $ 80 and plans to save an additional $ 10 each week. Write an inequality that represents this problem and explain your answer in detailed steps.

Answer 1

x=number of weeks
the inequality is:
10x+80≥150

Now, we solve this inequality:
10x+80≥150
10x≥150-80
10x≥70
x≥70/10
x≥7

Solution: Marisa needs to save at least 7 weeks for she can buy the DVD