A student walks 8 km at x km/h. He then cycles 15 km at 2x km/h. In terms of x write down the time taken in hours a)when walking b)when cycling c)if the total time for the journey is 2 h 35 min, find the student's walking speed.

Which statement best explains why ben uses the width hi to create the arc at j from point k

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14