Let a and b represent the lengths of the legs of a right triangle and let c represent the length of the hypotenuse. Values for two of the three lengths are given. Find the third length.a = 9 and b = 13
A. 11
B. 5
C. 250
D. 125
Answer: B
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Find parametric equations for the line described below.The line through the point P(-1, 1, 2) parallel to the vector 
A. x = 2t - 1, y = 7t + 1, z = -7t + 2 B. x = -2t - 1, y = 7t + 1, z = -7t + 2 C. x = 2t + 1, y = 7t - 1, z = -7t - 2 D. x = -2t + 1, y =7t - 1, z = -7t - 2
Solve the linear programming problem.A breed of cattle needs at least 10 protein and 8 fat units per day. Feed type I provides 6 protein and 2 fat units per bag at $4 per bag. Feed type II provides 2 protein and 3 fat units per bag at $3 per bag. What mixture of Feed type I and Feed type II will fill the dietary needs at minimum cost?
A. Use 1 bag of Feed type I and 1 bag of Feed type II. B. Use 4 bags of Feed type I and 0 bags of Feed type II. C. Use 1 bag of Feed type I and 2 bags of Feed type II. D. Use 0 bags of Feed type I and 5 bags of Feed type II.
Choose the best answer.You might go ice skating if the outside temperature is about
A. -1° C. B. -41° C. C. 11° C. D. 21° C.
Identify the equation as either an identity or not.cos2x - sin2x = 1 - 2 sin2x
A. Identity B. Not an identity