Cos(2θ)= 3/5 and 90∘≤θ≤180∘

Kevin is an insurance salesman. when he sells a policy, he makes 20 percent of the policy premium (p) up front; then each year the policy is active, he receives 15 percent of the original premium. which equation could be used to figure his total commission on a policy that has been active for five years? c=0.80p c=0.20p + 0.15p c=0.35p + 4(0.15) c=0.95p

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

If 3x+8=3x+8 is it one solution or no solution