Date: 11/25/14
Graded Assignment
Unit Test, Part 2
Show all your work.
(9 points)
1. Melissa bought a new car with 12 optional features to the car. Each optional feature costs either $23.99 or $120.84. If she paid $675.28 for all the optional features, how many of each type did she buy? Write and solve an equation to solve this problem. Show all your work.
Answer:
(675.28/2)-[120.84x2]-23.99x4=675.28
(10 points)
2. Ken mails three packages at the post office that weigh 8.1, 8.5, and 8.9 pounds. The post office that Ken uses rounds the weight of a package to the nearest pound to determine the price of shipment. It costs $2 to mail a package that weighs 8 pounds and $2.75 for packages that weigh 9 pounds.
a. How much did Ken pay to ship each package?
b. Ken has $7.25 in his wallet in cash. Use subtraction to determine whether Ken has enough to mail the three packages and how much extra money he has or needs.
Answer:
a. Ken pays $7.50 because you would round the 8.1 to 8, the 8.5 to 9 and the 8.9 to 9 and $2.75x2=$5.50+$2.00=$7.50
b. Ken paid $7.50 so he would need another $0.25
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