exam Maths Puzzle Numerical Ability

I need help with this Quadratic Equation...

The path of a falling object is given by the function S=-16t^2+Vo(t)+So where (Vo)represents the initial velocity in ft/sec and (So)r

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Please help me solve the following problem straigt from a worksheet:

The equation |x+1|=3 produces two solutions, x=2 and x=-4. For what values of a and b would the equation |x+a|=b produce two solutions that are equal? Explain your reasoning. The length of a rectangle is 5 cm more than 4 times its width. If the area of the rectangle is 80 cm2, find the dimensions of the rectangle to the nearest thousandth.

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