What are the domain and range of the function f(x)=x4-2x2 -4?
domain: all real numbers
range: all real numbers greater than or equal to -5
domain: all real numbers
range: all real numbers greater than or equal to -4
domain: all real numbers between -2.5 and 2.5
range: all real numbers
domain: all real numbers between -2.5 and 2.5
range: all real numbers greater than or equal to -5

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.

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Joline is solving the equation 0=x^2-5x-4 using the quadratic formula which value is the negative real number solution to her quadratic equation round to the nearest tenth if necessary