Gavin needs $80 to buy a fish tank. He has saved $8 and plans to work as a babysitter to earn $9 per hour. Which inequality shows the minimum number of hours, n, that Gavin should work as a babysitter to earn enough to buy the fish tank? (5 points)
8 + 9n ≥ 80, so n ≥ 8
8 + 9n ≤ 80, so n ≤ 8
9n ≥ 80 + 8, so n ≥ 9.8
9n ≤ 80 + 8, so n ≤ 9.8
8 + 9n ≥ 80, so n ≥ 8
Sophia works in a clothing store and earns $40 per day. She earns an extra $5 for each outfit she sells. If Sophia wants to earn at least $70 per day, which inequality shows the minimum number of outfits, n, that she should sell? (5 points)
40 + 5n ≤ 70, so n ≤ 6
40 + 5n ≥ 70, so n ≥ 25
40 + 5n ≤ 70, so n ≤ 25
40 + 5n ≥ 70, so n ≥ 6
40 + 5n ≥ 70, so n ≥ 6
Pedro wants to buy some shirts over the Internet. Each shirt costs $10.01 and has a shipping cost of $9.94 per order. If Pedro wants to spend no more than $70 for his shirts, which inequality shows the maximum number of shirts, p, that he can buy? (5 points)
9.94 + 10.01p ≤ 70, so p ≤ 6
9.94 − 10.01p ≤ 70, so p ≤ 7
9.94p + 10.01p ≤ 70, so p ≤ 8
9.94p − 10.01p ≤ 70 ≤ 60, so p ≤ 9