Suppose you have n items from which you choose r at a time. Explain why you must divide the number of permutations n!(n−r)! fraction n factorial , over open n minus r close factorial end fraction by r! to find the number of combinations n!r!(n−r)!.

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for

The solution of the system of linear equations is b. (2,-3) because the solution is the poi (point of intersection)