Which of the equations below is not a Linear Equation?

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

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52