Answer:
D
Step-by-step explanation:
His total earnings would be (18%)[$6.25(hours in 1st job) + $7.50(hours in 2nd job)]. However, we know that his total hours is 40 hours, so if we let the number of hours he spends in his 1st job be x, the number of hours in the 2nd is (40 - x).
Then his total earnings would be

. This means that we need to know the time he spends in 1 job (either the first or the second will do).
1, 2, 4, 5, 10 & 20
The greatest common factor is 20.
believe the answer is A. 7(6+2)
Answer:
Second option is the right choice.
Step-by-step explanation:
Divide the second equation by -5 and you'll get the equation same as first equation.

So, it has infinite many solutions.