Ziv's Bikes in Delray Beach rents bikes for $18 plus $8 per hour. Bryce paid $74 to rent a bike. For how many hours did he rent the bike? *

7 hours

Step-by-step explanation:

where h = the number of hours

18 + 8h = 74

8h = 74 - 18

8h = 56

h= 56/8

h = 7

calc check = 18 + (8 * 7) = 74

18 + 56 = 74

74 = 74

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: