James earns $7 per hour working at the local grocery store. James needs to earn at least $63 to pay for a new computer game. Which of the following inequalities describes the number of hours (N) that James will have to work to earn at least $63?
a. N less than 9
b. N greater than 9
c. N less than or equal to 9
d. N greater than or equal to 9
Answer : c
Explanation:
To begin the solution to this problem we must first determine how many hours James must work to earn $63 at a rate of $7 per hour. We use division to do this as follows:
63 / 7 = 9
Now we know that if James worked 9 hours he will earn $63. However, since it is an inequality, we also know that to earn up to that amount ($63) he must work any number of hours (N) less than or equal to 9 hours.
©Copyright 2007.Najwa S. Hirn. All rights reserved.
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