1. Solve the following equation for all values of x.
10x2 – 5x=0

20=0+5x

x=20/5

x=4

x=4

x=4

exact form:

x=0, 1/2

decimal form:

x=0, 0.5

Lin's father pay $18.19 for the meal

Step-by-step explanation:

Cost for meal = $20

He has a 15% coupon for the meal

Cost of meal after applying coupon =

Cost of meal after applying coupon =

After the discount, a 7% sales tax is applied.

Cost of meal after applying tax =

Hence lin's father pay $18.19 for the meal