Question 924213: A woman can bicycle 78 miles in the same time as it takes her to walk 24 miles. She can ride 9 mph faster than she can walk. How fast can she walk?
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! x = riding speed
y = walking speed
---
x = y + 9
---
s = d/t
t = d/s
---
riding time:
t = 78/x
---
walking time:
t = 24/y
---
78/x = 24/y
78y = 24x
78y = 24(y + 9)
78y = 24y + 216
54y = 216
y = 216/54
y = 4 mph
---
answer:
x = riding speed = 13 mph
y = walking speed = 4 mph
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Convert fractions, decimals, and percents:
https://sooeet.com/math/fraction-decimal-percent.php
---
Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php
|
|
|
