exam Maths Puzzle Numerical Ability

-3x+10>16 or 9-x<7

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exam Other Question

The length of a rectsngle is fixed at 14cm. What widths will make the perimeter greater than 86cm? the width must be bigger than ___?
Will someone help me with this I cannot do word problems at all!!! How do I do these problems with variables and exponents?

z to the 4th power /x squared

z to the 4th power / z to the 5th power