F(x) 2x+6; vertical shrink by a factor of 1/2

Given that abcd is a rhombus, what is the value of x?

Find the dimensions of the circle. area = 64π in.² r= in.

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%)