Verify each equation
1. cos(x + (pi/2)) = -sin x
2. sin(n pi + θ) = -1^(n) sin θ, n is an integer
3. (sin x + cos x)^(2) = 1 + sin 2x

Without graphing the linear functions, find the coordinates of the point of intersection of their graphs: y=3x−11 and y=4

(10. in the figure, a aabc is drawn tocircumscribe a circle of radius 3 cm ,such thatthe segments bd and dc are respectively oflength 6 cm and 9 cm. find the length ofsides ab and ac.

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates