The school playground is in the shape of a pentagon. there is a drinking fountain at each of the 5 corners of the playground. how many ways can someone walk from one drinking fountain to another drinking fountain

You invested $5000 between two accounts paying 4% and 9% annual interest, respectively. if the total interest earned for theyear was $350, how much was invested at each rate? $was invested at 4% andwas invested at 9%.

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15