Answer:
Cashier job: 23 hours
Tutor job: 7 hours
Explanation:
Hi, to answer this question we have to write a system of equations:
8 x + 12y = 268 ($8 per hour as a cashier. $12 per hour as a tutor. Made $268)
x + y = 30 (she worked 30 hours)
Where:
- x = number of hours spent at the cashier job
- y = number of hours spent at the tutor job
Solving for x in the second equation:
x = 30-y
Replacing the value of x in the first equation:
8 (30-y) +12y =268
240 -8y +12y =268
12y-8y=268-240
4y = 28
y= 28/4
y = 7 (hours spent at the second job)
Replacing the value of y in the second equation
x= 30-y
x = 30 -(7)
x =23 (hours spent at the first job)