SOLUTION
write out the information given,

Also

Defina a parameter for the number of hours worked in each company

Since the total hours worked is 30, we have

The amount received from each company will be hours worked multiplied by the pay per hours.
hence

Since the total amount to you want is $ 250, then

Therefore
The system of equation for the scenario is
x+y = 30, 10x+ 8x = 250
Answer is Option C