Assign two variables for each problem, and write the equations. do not solve.

1) two different types of batteries are needed to run joshua's remote-controlled jeep. the two batteries produce a total voltage of 6.5 v. the difference in their voltage is 2.5 v. determine the voltages of the two batteries.

2) jason, a vendor at the minute maid park in houston, sells two sizes of drinks. one costs $1.00 and the other costs $1.50. he knows he sold a total of 230 drinks for a total of $285.00. how many small drinks did he sell?

need two variables and two equations for both.