exam Maths Puzzle Numerical Ability

What is the inverse of x=y squared ???

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exam Other Question

multiply and write each answer in simplest form
4 1/5 x 10/21 x 9/20
#2: Solve each absolute value inequality using interval testing. Graph the solution on a number line
and write the solution using set-builder notation form or interval notation form.
a. The absolute value of 4k-20 is greater than or equal to 0.