Answer:
x=-1, y=-5 ---> (-1, -5)
Step-by-step explanation:
so you want to plug one equation into the other. so start off by plugging y=−4x−9 into the y value of 4x−y=1-----> 4x-(-4x-9)=1. now subtract and isolate x which ends up being x=-1. now plug the x=-1 into either equation and isolate and solve for your y value which ends up being y=-5. you can check you answer by plugging both the x and y you found into one equation and making sure the answer it gives is true. ;)
Answer:
225 tons is the total
Step-by-step explanation:
Let the total amount be x
Given that,
32% of x = 72tons
32x/100 = 72tons
32x = 7200tons
x = 225 tons
To verify,
32% of 225 = 72tons
32/100 * 225 = 72 tons
72 = 72
Hence, verified.
Answer:
are not choice b 75%
75/100 *20 = 1500/100=15
Step-by-step explanation:
The cattle train
speed - 36.5 km/h
time - x h
the passenger train
speed - 29.2 km/h
time - (2.4+x) h
The cattle train caught up to the passenger train so the distance they travelled is the same.
Distance is speed times time.

The passenger train travelled for
12 hours before the cattle train caught up.