Determine whether or not the function is one-to-one.{(1, 27), (2, 40), (3, 55), (4, 55), (5, 21)}
A. Yes
B. No
Answer: B
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Completely factor the polynomial or state that the polynomial is prime.15x4 - 14x2 - 8
A. (3x2 - 4)(5x2 + 2) B. (3x2 + 1)(5x2 - 8) C. (15x2 - 4)(x2 + 2) D. (5x - 2)(3x + 4)
Simplify the expression. Assume that all variables are positive when they appear.
- 
+ 
A. 12x
- 5
B. 12x
- 5
C. 11x
- 5
D. 12
- 
Solve.A plane flying with a tailwind flew at a speed of 420 mph, relative to the ground. When flying against the tailwind, it flew at a speed of 310 mph. Graph the system to find the speed of the plane in calm air and the speed of the tailwind.
A. Speed of plane: 375 mph Speed of tailwind: 45 mph B. Speed of plane: 45 mph Speed of tailwind: 375 mph C. Speed of plane: 55 mph Speed of tailwind: 365 mph D. Speed of plane: 365 mph Speed of tailwind: 55 mph
Find a formula for the nth term of the arithmetic sequence shown in the graph.
A. an = 3 - n B. an = n + 1 C. an = n - 3 D. an = n + 2