Question

Can someone help me with some math questions?

Answer 1

just post them one by one, first.
what's your question then...

Answer 2

A car repair shop charged $80 per hour for labor and $210 for the parts of a car. If the total cost of repair for the car was $490, how many hours did it take to repair the car?

0.59

2.71

3.50

8.75

Answer 3

let x is the time was needed to repair that car.
80x + 210 = 490
solve for x

subtract on both sides by 210, we get
80x + 210 = 490
80x = 490 - 210
80x = 280

then divide by 80 to both sides, we get
80x = 280
x = 280/80 = 3.50 h