Find the product or quotient, using trigonometric form. Write the answer in the form a + bi.(8 + 7i)(8 + 8i)
A. 56i2 + 120i + 64
B. 120 - 8i
C. 8 + 120i
D. 8 - 120i
Answer: C
Mathematics
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Solve the right triangle shown in the figure. Round lengths to one decimal place and express angles to the nearest tenth of a degree. 
A = 51.4°, c = 51.2
A. B = 51.4°, a = 40, b = 31.9 B. B = 38.6°, a = 40, b = 31.9 C. B = 38.6°, a = 31.9, b = 40 D. B = 51.4°, a = 31.9, b = 40
Mathematics
Eliminate the parameter of the pair of parametric equations.x = 
, y = 2t + 5
A. y = 2
- 5, x ? 0
B. y = 2
+ 5, x ? 0
C. y = 2x2 - 5
D. y = 2x2 + 5
Mathematics
Decide whether the given number is a solution of the given equation.Is 4 a solution of 6x - 5 = 47 - 7x?
A. yes B. no
Mathematics
Simplify the expression.-(-6)4
A. Exponent: 4, base: -24 B. Exponent: -6, base: -4 C. Exponent: 4, base: 6 D. Exponent: 4, base: -6
Mathematics