Answer: the rate of the car is 50mph
Step-by-step explanation:
Let x represent the average speed of the bus.
Let y represent the distance travelled by the bus.
The average speed of the car is 30 mph slower than twice the speed of the bus. This means that the average speed of the car would be
2x - 30
Distance = speed × time
Time = distance/speed
Therefore, In 2 hours time,
2 = y/x
2x = y
In two hours the car is 20 miles ahead of the bus. Therefore
2 = (y + 20)/(2x - 30)
2(2x - 30) = y + 20
4x - 60 = y + 20 - - - - - - - - -1
Substituting y = 2x into equation 1, it becomes
4x - 60 = 2x + 20
4x - 2x = 20 + 60
2x = 80
x = 80/2 = 40
The speed of the car would be
2x - 30 = 2 × 40 - 30
= 80 - 30 = 50 mph
To get 75 decreased by 40% you subtract 40% from 100%.
100 - 40 = 60
So to get 60% of 75 you multiply .60 by 75.
.60 x 75 = 45
You have $45 now, but you have to decrease it by 40% again. You do the same process, so we need to multiply .60 by 45.
.60 x 45 = 27
So, the final result is $27.
Answer:
No
Yes
No
No
Step-by-step explanation:
Answer:
40 its c
Step-by-step explanation:
It’s about 26.67%... hope this helps!
