A man travels from town X to town Y at an average rate of 60 mph and returns at an average rate of 50 mph. He takes a 1/2 hour l
onger than he would take if he made the round trip at an average of 55 mph. What is the distance from Town X to Town Y?
2 answers:
Answer:
1650 miles
Step-by-step explanation:
<span>Distance = d miles ; rate = 60 mph ; time = d/60 hrs
distance = d miles ; rate = 50 mph ; time = d/50 hrs
----------------------
Round-trip DATA:
distance = 2d miles ; rate = 55 mph ; time = (2d)/55 hrs
-----------------------------------------------------------
Equation:
Roundtrip time - other time = -1/2 hr
(2d)/55 - [(d/60)+(d/50)] = -1/2
(2d)/55 - [(110d)/(50*60)] = -1/2
---
600(2d) - 11[110d] = -16500
1200d - 1210d = -16500
-10d = -16500
distance = 1650 miles
Hope this helped :)</span>
You might be interested in
Answer:
(1,0), (0,0),(-2<0)<(-1, -2)
Step-by-step explanation:
Answer:
12 and 13
Step-by-step explanation:
Answer:
x = 4
Step-by-step explanation:
solate the variable by dividing each side by factors that don't contain the variable.
Answer:
A. 3x^2 + 4 = 52
3x^2 = 52 - 4
3x^2 = 48
x^2 = 48/3
x^2 = 16
x =
x = 4
B. x^2 - 121 = 0
x^2 = 121
x =
x = 11
C. (b + 4 )2 = 49
2b + 8 = 49
2b = 49 - 8
2b = 41
b = 41/2
Answer:
The answer is y=5x²
Step-by-step explanation:
If you put y=5x² on a graph paper it will be in a staright line.