The rectangle below has an area of x^2-x-72 square meters and a length of x+8 meters. What expression represents the width of the rectangle?

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.