Gabriella drives her car 320
320
miles and averages a certain speed. If the average speed had been 9mph
9⁢mph
less, she could have traveled only 260
260
miles in the same length of time. What is her average speed?

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

Acircus act has 3 times as many elephants as acrobats. jorge noticed that all together there were 56 legs in the circus ring. how many elephants were in the show?

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?