You earn $9 per hour babysitting and $4 per hour washing cars. Modeled by 9b + 4c. Evaluate if you babysit for b=10 hours and wash c=10 cars to find total earnings.
To find the total earnings, we need to evaluate the expression 9b + 4c when b = 10 hours and c = 10 cars.
Substituting the given values, we get:
9(10) + 4(10) = 90 + 40 = 130.
Therefore, if you babysit for 10 hours and wash 10 cars, your total earnings will be $130.