In a class the ratio of the number of boys to the number of girls is 5:6.if there are 20 boys in the class, how many pupils are in the class?

44 total pupils

Step-by-step explanation:

Take 20 and divide it by 5, you end up with 4. Take 4 and multiply it by 6, you end up with 24. Add 20 and 24, you get 44.

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:

im not sure

step-by-step explanation: