exam Maths Puzzle Numerical Ability

please help,

solve the following:

7|z+6|+8 is less than or equal to 57

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exam Other Question

Rationalize the denominator. Assume that all expressions under radicals represent positive numbers.

root (3, 2y^4) / root (3, 6x^4) I am having a problem solving this problem

a square root of 63- 2 and a square root of 28+ 5and a sqaure root of 7