It took john 12 hours riding his bike to make the round trip to his uncle's. if he averaged 20 mph out and 30 mph back, how long did he travel each way? (round answer to nearest tenth.)

 Let d = dist traveled one way
Write a time equation;
time = dist/speed
d/20+d/30 = 12

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1

the answer is:

the answer is:

to solve the problem, we need to remember the quotient of power property, it's defined by the following relation:

if we have a quotienf of powers that have the same base, we need to keep the same base and subtract the exponent of the denominator power to the exponent of the numerator power.

so, we are given the expression:

then, calculating we have:

hence, the answer is:

have a nice day!