xy + y + 7x + 7
A. (x + 1)(7y + 7)
B. (x + 1)(y + 7)
C. (x + 7)(y + 1)
D. (7x + 7)(y + 1)
Answer: B
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Solve the problem.Looking ahead to retirement, you sign up for automatic savings in a fixed-income 401K plan that pays 5.5% per year compounded annually. You plan to invest $3500 at the end of each year for the next 20 years. How much will your account have in it at the end of 20 years?
A. $122,039 B. $120,496 C. $123,337 D. $123,809
Solve the problem.To find the height of this tree, Sarah marked the tree at eye level, 1.8 meters above the ground. She measured 36 m from the base of the tree and then held a 5-cm ruler vertically in front of her eye until the ruler just obscured the tree above the mark. Using a string tied through a hole in one end of the ruler, Sarah found that the distance from her eye to the ruler was 4.8 centimeters. What was the height of the tree? Round to the nearest unit.
A. 35 m B. 39 m C. 37 m D. 41 m
Solve triangle, if possible. If necessary, round your answers to the nearest tenth. 
A. C = 103°, a ? 60, b ? 33.9 B. C = 103°, a ? 12.1, b ? 21.5 C. C = 97°, a ? 11.9, b ? 21.1 D. C = 103°, a ? 21.5, b ? 12.1
Solve the equation. Write complex solutions in standard form.x2 - 6x + 13 = 0
A. 5, 1 B. 6 ± 4i C. -3 ± 2i D. 3 ± 2i