To receive a C grade, a student must average more than 77 but less than or equal to 85. If Claire received a C in the course and had five grades of 76, 85, 78, 64, and 80 before taking the final exam, what were the possible grades for her final if there were 100 points possible?

Which of the following expressions is equal to 2x^2+8

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a.the profit when the unit price is equal to 0b.the unit price(s) when the profit is equal to 0c.the profit when the unit price is greatestd.the unit price(s) when profit is greatest

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?