Simplify.- 
x - 
y + 
x - 
y - 
x + 
y
A. 
x + 
y
B. 
x + 
y
C. 
x + 
y
D. 0
Answer: D
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Solve the problem and write the answer using scientific notation.A light-year is the distance that light travels in one year. Find the number of miles in a light-year if light travels 1.86 × 105 miles per second.
A. 5.86 × 107 miles B. 5.86 × 1012 miles C. 5.86 × 105 miles D. 5.86 × 1014 miles
Use the discriminant to determine the number and type of solutions for the equation. If the solution(s) are real, state whether they are rational or irrational.4x2 - 12x + 9 = 0
A. Two irrational solutions B. Two rational solutions C. One rational solution D. Two nonreal complex solutions
Use trigonometric identities to solve each equation in the interval [0, 2?]3 cot2 x - 4 csc x = 1
A. 
B. 
C. 
D. 
Complete the statement using the indicated property.-9(x + 3) = ______ , distributive
A. x - 27 B. -9x - 27 C. 9x - 27 D. -9x + 3