Question 814264
D = ?
s = d / t
d = s * t
---
2nd half:
d = s * t
d = 84 km/h * 10 min * (1/60) h/min = 14 km
D(1 - 5/12) = 14
D(12/12 - 5/12) = 14
D(7/12) = 14
D = 14(12/7)
D = 24
---
1st half:
d = D - 14 = 24 - 14 = 10 km
t = d / s
t = 10/60 hours
t = 10/60 hours * 60 min/hr = 10 min
---
Answer:
total time = 10 + 10 = 20 min
---
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