Solve the system by substitution or elimination. If a system is inconsistent or has dependent equations, say so.y = - 
x-5x - 7y = 1
A. 
B. ?; inconsistent system
C. 
D. 
Answer: D
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Solve the problem.There are 6 women running in a race. How many different ways could first, second, and third place finishers occur?
A. 20 B. 18 C. 216 D. 120
Give a geometric description of the set of points whose coordinates satisfy the given conditions.x2 + y2 + z2 = 81, z = -2
A. All points within the sphere x2 + y2 + z2 = 81 and above the plane z = -2 B. All points on the sphere x2 + y2 + z2 = 81 and above the plane z = -2 C. The sphere x2 + y2 + z2 = 4 D. The circle x2 + y2 = 77 in the plane z = -2
Solve the problem. Round to an appropriate number of significant digits.A basketball player shoots the ball with a velocity of 20.7 ft/s at an angle of 41.7° with the horizontal. To the nearest tenth, find the magnitude of the horizontal component of the resultant vector.
A. 15.5 ft/s B. 7.8 ft/s C. 13.8 ft/s D. 6.9 ft/s
Use the Rational Zeros Theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. f(x) = x4 + 9x2 - 400
A. -4, 4; f(x) = (x - 4)(x + 4)(x2 + 25) B. -5, 5; f(x) = (x - 5)(x + 5)(x2 + 16) C. -4, -5, 4, 5; f(x) = (x - 4)(x + 4)(x - 5)(x + 5) D. 4; f(x) = (x - 4)2(x2 + 25)