Answer:
speed of train A = 70 + 20 = 90 miles per hour
speed of train B = 70 miles per hour
Step-by-step explanation:
Let
speed of train B = a
speed of train A = a + 20
Recall
speed = distance/time
The travel time is same for both train. Therefore, let us make time subject of the formula in the speed equation.
Time = distance/speed
270/a + 20 = 210/a
cross multiply
270a = 210(a + 20)
270a = 210a + 4200
270a - 210a = 4200
60a = 4200
divide both sides by 60
a = 4200/60
a = 70
speed of train A = 70 + 20 = 90 miles per hour
speed of train B = 70 miles per hour
Answer:
480,000
Step-by-step explanation:
2% or 0.02 times 24 million is 480,000
Step-by-step explanation:
Draw points at
(-1, -4)
(0, -2)
(1, 0)
(2, 2)
(3, 4)
Then draw a line through those points and that should do it.
Answer:
C and $320.45
Step-by-step explanation:
I think it's C because this is the full function :
And to get the b part of the question i just put the number in
I'm not a 100% sure, sorry if it's wrong
