<PRE><B>Question 817152</B>
a + b = 18 km / 1 hr = 18 kph
---
b = 1.25a
---
a + b = 18
a + 1.25a = 18
2.25a = 18
a = 18/2.25
---
a = 8 kph
b = 10 kph
---
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</PRE>