Y = 2x + 4
y = 3x + 6
Solve for x

How to solve it and what thw answer is

The sales tax rate is 7.25%. how much tax in dollars is added on an item that costs $56.00? a. $4.06 b. $7.25 c. $14.50 d. $60.06

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.