Use the graph below to determine the number of solutions the system has. 1)
y=-3
x=4

2)
y=4x-1
y=-2x+5

3)
y=-2x
y=-2x+5

will someone please explain this out to me? It's due soon and I don't know how to do this. Thanks

1. jesus bought 3 pairs of jeans for $71.40. how much would he need to pay for 8 pairs of jeans? unit rate $ pair cost for 8 2.morgan scored 41 points in 3 games. how many points would you expect him to make in an 11 game season? unit rate points/game points in 11 games 3. andy drove 840 miles in 12 hours. how far could he drive in 3 hours? unit rate (speed) distance 4. pira drives 825 miles to california. the trip takes him 17 hours. he uses 38 gallons of gas on the trip, which costs him $125? a) find his speed b) find his gas mileage c) find the unit price he paid for gas me this is due ! explanation for each one ! ! ! ! someone