Systems of Linear Functions in Financial Contexts — Quiz
Question 2 • Financial Math
Harper has two jobs. Job 1 pays $10 per hour and job 2 pays $15 per hour. If Harper worked a total of 20 hours and earned $250 , which system of equations can be used to determine how many hours Harper worked at each job?
Answer
A
10 x plus 10 y is equal to 20 15 x plus 10 y is equal to 250
B
x plus y is equal to 20 10 x plus 15 y is equal to 250
C
x plus 2 y is equal to 20 10 x plus 15 y is equal to 250
D
x plus y is equal to 250 10 x plus 15 y is equal to 20
Explanation
Let x be the hours Harper worked at job 1 and y be the hours worked at job 2. The total hours equation is x + y = 20. Since the jobs pay $10 and $15 per hour, respectively, the earnings equation is 10x + 15y = 250. These are the equations in choice B.
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