Which expression is equivalent to 5x2−(3x−6x2)+6+(7x−2)? 11x² + 4x + 4

−x2+4x+4

11x² + 10x + 8

−x2+10x+8

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

What is the average rate of change for this function for the interval from x=2 to x=4 ?

Find the missing factor. write your answer inexponential form.9^2=9^4×