Solve the problem.The polynomial function 
represents the yearly income (or loss) from a real estate investment, where t is time in years. After how many years does income begin to decline?
A. 6 yr
B. 12 yr
C. 8 yr
D. 5 yr
Answer: A
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Solve the system.A small airplane traveled 185 mph with a tailwind and 135 mph with a headwind. Find the speed of the wind and the speed of the airplane in still air.
A. speed of the wind was 25 mph, speed of the plane in still air was 160 mph B. speed of the wind was 20 mph, speed of the plane in still air was 165 mph C. speed of the wind was 20 mph, speed of the plane in still air was 155 mph D. speed of the wind was 35 mph, speed of the plane in still air was 150 mph
Perform the indicated operations and simplify the result. Leave the answer in factored form.
- 
+ 
A. 
B. 
C. 
D. 
Multiply.(y - 0.8)2
A. 2y + 1.6 B. y2 + 1.6y - 0.64 C. y2 - 1.6y + 0.64 D. y2 + 0.64
The demand for a certain energy-efficient home is given by f(p1, p2), where p1 is the price of the home and p2 is the price of electricity. Which of the following explains why 
> 0?
A. Homes are too expensive during energy crises. B. As the price of electricity goes up, demand for the home goes up. C. The price of electricity keeps going up due to increased demand. D. As the price of electricity increases, demand for the home depends more on the price of the home than on the price of electricity. E. As the price of electricity goes up, demand for the home goes down.