Last season two running backs on the steelers football team rushed for a combined total of 1550 yards once rushed 4 times as many yards as the other. how many yards were rushed by each player?

i belive those are the ones that are under 90 degreese.

your answer is 125y5

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."