SOLUTION: It took Brian 8 hours to drive to a job interview. On the way home, he was able to increase his average speed by 16 mph and make the return drive in only 6 hours. Find his average
Algebra ->
Customizable Word Problem Solvers
-> Travel
-> SOLUTION: It took Brian 8 hours to drive to a job interview. On the way home, he was able to increase his average speed by 16 mph and make the return drive in only 6 hours. Find his average
Log On
Question 816120: It took Brian 8 hours to drive to a job interview. On the way home, he was able to increase his average speed by 16 mph and make the return drive in only 6 hours. Find his average speed on the return drive. Found 2 solutions by richwmiller, TimothyLamb:Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! s = d / t
---
outbound:
s = D / 8
D = 8s
---
return:
s + 16 = D / 6
D = 6(s + 16)
D = 6s + 96
---
D = 8s = 6s + 96
2s = 96
---
s = 48
---
Answer:
outbound speed: 48 mph
return speed: 64 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
