exam Maths Puzzle Numerical Ability

If x^9=127 then find x^4 accurate to two digits after the decimal point.

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Instructions: Find one factor for each polynomial.

What is the solution for 4x^2+16x+16 Suppose you see the two summer jobs advertised at the right. Let x= the amount of sales and y= money earned in a week.

cellular phone sales: y=150+0.2x
stereo sales: y=200+0