Find the constant of variation k for the direct variation a) k=2.5 b) k=-2 c) k=2 d) k=0.5

Marcus built a model car that is 4 inches wide. what scale was used to build the car if the actual width of the car is 6 feet? a. 1 in. = 2 ftb. 1 in. = 2.5 ftc. 1 in. = 1.5 ftd. 1 ft = 1.5 in.

Two parallel lines are crossed by a transversal. what is the value of x? x = 40 x = 70 x = 110 x = 130

Which shows the correct substitution of the values a, b and c from the equation 1=-2x+3x^2+1