exam Maths Puzzle Numerical Ability

The area of a rectangle is 40 in.2. If the length is x+4in. and the width is x-2., what are the dimensions of the rectangle?

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exam Other Question

WRITE THE STANDARD EQUATION FOR THE HYPERBOLA WITH FOCI:(7,0) AND (-7,0) AND VERTICES (5,0) AND (-5,0)? I am having trouble with this one. Any help is appreciated.

Simplify

Square root of 3x/2

Thanks