Rob is saving to buy a new MP3 player. For every $12 he earns babysitting, he saves $7. On Saturday, Rob earned $72 babysitting. How much money did he save?

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did

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?

The cost of a taxi ride includes an initial charge of $2.00. if a 5km ride cost $6.00 and a 10km ride cost $10.00, determine the cost of a 15km ride.