exam Maths Puzzle Numerical Ability

I need to simplify the expressions - all variables are positive -HELP!!!!!

1. 7^4/5/7^1/3

2. (10^3/4 * 4^3/4)^-4

3. 1/x^-2/3

4. xy^3/x^1/4y^2/3

5. (

Read Solution (Total 0)

exam Other Question

Write 0.21 as a percent.
Would this be 21%? Could some on please help me? I do not remember how to se the Pythagorean theorem to determine the length of each line segment. Where appropriate,
round to the nearest hundredth.
( 1,-1) (3,2)