Which of the following quadratic functions is in standard form? A.) y= 6x+8
B.) y= 1/2x^3+5x^2 – 4x
C.) y= x^2 +3x – 5
D.) y= -10x – 3x^2 + 50

An airport in death valley is 60 feet below sea level, and an airplane is flying 2,000 feet above sea level. how many feet must the plane descend in order to land? a. 2060 b. 2000 feet c. 1940 feet d. 1880 feet e.1400 feet will mark as brainliest

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2