3. Thorin works at Gino’s pizza. He gets $70 per night and $2 for each pizza he sells. How many pizzas did he sell in one night if he made $210 dollars? Write an equation and solve.

70 pizzas

Step-by-step explanation:

x=number of pizzas sold

210=70+2x

2x=140

x=70

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:

only 10/60 isn't equivalent

hope this : )