Find the axis of symmetry of the graph of the parabola.f(x) = 7(x + 
)2 - 16.13
A. x = 
B. y = -16.13
C. x = -
D. x = -16.13
Answer: C
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Solve using the elimination method.x + y = 9x - y = -3
A. No solution B. (2, 7) C. (-3, 7) D. (3, 6)
Solve the problem. Round your answer to the nearest cent.Brad invests $3900 in an account paying 11% compounded quarterly. How much is in the account after 12 months?
A. $4347.02 B. $4007.25 C. $4329.00 D. $5920.47
Solve the problem.The rate at which an assembly line worker's efficiency E (expressed as a percent) changes with respect to time t is given by 
where t is the number of hours since the worker's shift began. Assuming that 
find E(t).
A. E(t) = 55t - 2t2 + 141 B. E(t) = 55t - 2t2 + 35 C. E(t) = 55t - 4t2 + 35 D. E(t) = 55t - 2t2 + 88
In the indicated voting system, the weights represent, in order, voters A, B, C, and so on. Identify the dictator if there is one, and identify those voters with veto power if there are any.[51 : 20, 20, 20, 10, 10]
A. No dictator; voters A, B, and C have veto power. B. No dictator; each voter has veto power. C. No dictator; no voter has veto power. D. No dictator; voters D and E have veto power.