Consider the function f(x)=8-3x^2 find the value of f(x) when x=3

The parabola opens: y=√x-4 (principal square root) up down right left

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

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%)