Which of the following is NOT permitted when verifying trigonometric identities? a. simplifying one side of the identity to match the other side

b. cross multiplying if the identity is a proportion

c. simplifying each side of the identity separately to get the same expression on both sides

Solve the system by the elimination method. 2x + y - 4 = 0 2x - y - 4 = 0 when you eliminate y, what is the resulting equation? a.x = 0 b.4x = -8 c.4x = 8

State whether weight is a function of height for the six students and explain. a. yes, height is a function of weight because two students weigh 165 pounds but have different heights. b. no, height is not a function of weight because two students weigh 165 pounds but have different heights. c. yes, weight is a function of height because for each value of height there is one corresponding value of weight. d. no, weight is not a function of height because there is not enough data to determine a function.

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.