The answer would be -21/4
Answer:
D
Step-by-step explanation:
WE know that (distance) = Speed * time
and Speed = distance/time & time = distance/speed
Let AB = 60 mi. & the speed is 55 mi/h , then the spent to reach the rink is
t= 60/55 = 1.09 h
Since the total time is 2.75 h & he spent 1.09h to go to the rink, so the time spent on his way back is 2.75-1.09 = 1.659 h
So his speed on his way back is 60/1.659 =36.16 mi/h
Ok so we can model this like
This is because the initial price was 1.89$ for the drink, then for every refill, it was a quarter extra. To solve for x we start by subtracting 1.89 from both sides.
So now we divide by 0.25 or multiply by 4 and we get
But x cannot be a fraction. So we round this to the least integer, or 7