It's a computation. It would be 8!/3!(8-3)! If my memory serves me correctly.
I'm not 100% sur what it is asking but I think the expression would be
15 min. * 10 = min. till the tank is full
Answer:
-4x - 20x
Step-by-step explanation:
Multiply 2 by -10
2x-y=6;5x+10y=-10. -y=-2x+6. -y/-1=-2x+6/-1. y=2x-6. 5x+10y=-10. 5x+10(2x-6)=-10. 25x-60=-10. 25x=50. 25x/25=50/25. y=2x-6. y=(2)(2)-6. y=-2. Therefore, x=2 and y=-2
