Hola I need help with my math homework as soon as you can please

Question

1.) Perform the indicated operation and simplify. Assume that all variables result in nonzero denominators.

A.) 

B.) None of these

C.) 6

D.)

 

E.) 0

2.) Lisa averages 15 mi/h cycling to her school carrying her friend and 20 mi/h on the return trip alone. What is Lisa's average speed for the entire trip rounded to the nearest tenth?

A.) 17.5 mi/h

B.) 20.4 mi/h

C.) 17.1 mi/h

D.1) 20.0 mi/h

Answer 1

Hello, Holly,

(6x-30)/(x-5)

6(x -5)/(x - 5)

6(x -5)/(x - 5)

6

==============

Lisa - we'll have to assume the return trip was the same distance (route).

Let's assume a distance. I'll choose 15 miles one way, or 30 miles round trip. I calculated the required time each way (divide the distance by the speed). I then added the times and divided by the total distance to give an average speed of 17.1 mph. It makes no difference what we choose for distance - the average speed will be 12.1 mph.

Bob