A bowling alley has 10 lanes. During rush hour, the average inter-arrival time between groups of customers is 2 minutes, with a standard deviation of 1 minute. Each lane can handle one group at a time. The average time taken by a group at a lane is 18 minutes, with a standard deviation of 9 minutes. What is the average time a group of customers wait for a lane to free up, after arriving at the alley

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.

Solve 3x-18=2y and 5x-6y=6 by elimination show work