Answer:
46 hours
Step-by-step explanation:
1. add all the hours you've worked (41+49+48+46=184)
2. divide the sum by the number of weeks (184/4=46)

Substitute x = 3 in any given equations. I will do in y = - x + 1

Therefore the answer is (3,-2)
This will only have one solution because it does not deal with a quadratic. Then to isolate x you need to get the similar terms on different sides by subtracting or adding, Then divide both sides by the number next to x (coefficient).
Jessica runs fastest because her time/second is about 10 seconds while brookes is around 12.