The Smith family went out to dinner and received great service. They decided to leave a 20% tip for their waitress. If their dinner bil totaled $90, how much was the
tip? Think You need to find what percent of what number? Show your work

$75

Step-by-step explanation:

90=1.2x

90/1.2=x

75=x

$75 :D

Step-by-step explanation:

90=1.2x 90/1.2=x 75=x

answer: -1

step-by-step explanation:

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w