Maths Fractions Questions! How to do? Will mark the BRAINLIEAST!

1. 5 packets

2. 3/8

1. 4/5 to 16/20

1/4 to 5/20                                

1/10 to 2/20

16- (2*5)= 16-10= 6                                

6/2 = 3 packets

2 pack.+3 pack.= 5 packets

2. 1/2= .5

.5*3/4=.375

.375=3/8

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:

25% is the answer