Perform the indicated operations and simplify the result so there are no quotients to complete the identity.
- 
= ?
A. 1 + cot ?
B. sec ? csc ?
C. sin ? tan ?
D. -2 tan2?
Answer: D
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Solve the problem.On a buying trip in Los Angeles, Rosaria Perez ordered 120 pieces of jewelry: a number of bracelets at $10 each and a number of necklaces at $14 each. She wrote a check for $1440 to pay for the order. How many bracelets and how many necklaces did Rosaria purchase?
A. 65 bracelets and 55 necklaces B. 55 bracelets and 65 necklaces C. 70 bracelets and 50 necklaces D. 60 bracelets and 60 necklaces
Use the rules for exponents to rewrite the expression and then evaluate the new expression. 
A. -14 B. -5 C. 0 D. 1
Solve the system of linear equations. x + 7y = -33 7x + 7y = -63
A. (5, -5) B. No solution C. (-4, -5) D. (-5, -4)
Translate the sentence into an equation. Use x to represent the unknown number. 10 times a number, increased by 5, is the same as 12 times the number, decreased by 13.
A. 10x + 5 = 12x - 13 B. 10(x + 5) = 12(x - 13) C. 10(x - 13) = 12(x + 5) D. 10x + 13 = 12x - 5