3. As a valet at the mall, Davis works 7-hour shifts. He earns $4 per hour and keeps 70% of his tip money. How much does Davis need to be tipped so that he takes home exactly $87.50, before taxes are deducted, per shift?

A $74.38
B $125.00
C $85.00
D $198.33

Question

3.  	As a valet at the mall, Davis works 7-hour shifts. He earns $4 per hour and keeps 70% of his tip money. How much does Davis need to be tipped so that he takes home exactly $87.50, before taxes are deducted, per shift?

A 	$74.38
B 	$125.00
C 	$85.00
D 	$198.33

ash2326 · Answer

7 hour shift so 7*4$=$28 he earns a day
suppose he gets $x  per day
70% of x=70/100 * x=0.7 x
so 0.7x+28=87.5
0.7x=59.5
x= $85
he need to be tipped $ 85