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

1) a pair of boots and a pair of tennis shoes cost $196.12. the difference in their cost is $44.38. determine the cost of each type of footwear.

2) 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.

Which of the following tables represents exponential functions?

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?