The graph of y = 2x^2 is shifted 8 units down on a coordinate grid. What are the roots of the equation that correspond to the new graph? O A x= -2 and x = 2
B. r=-2 and x = 4
OC. x = -4 and x = 2
D. r= -4 and x = 4
ILL GIVE BRAINLIST

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Solve for n? [tex]z = \frac{3}{4} mn[/tex]

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)