What percent of the ninth graders scored between 69 and 87?

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3