If a federal reserve sets the reserve rate to 4%, what is the resulting money multiplier

With these: 18/36 = 1/? missing number change 1 5/8 to improper fraction. change 19/5 to a mixed number.

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.