exam Maths Puzzle Numerical Ability

"Your grades are 76, 90, 85 and 87. If the next grade received counts twice, what grade do you need to maintain an average of 84 in the class?"

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Suppose that the width of a rectangle is 2 inches shorter than the length and that the perimeter of the rectangle is 80.

A) Set up an equation for the perimeter involving only find each quotient university of phoenix elementary and intermediate algebra (-4 power of 0 -8power 0