Determine whether the pair of fractions is equivalent.
and 
A. equivalent
B. not equivalent
Answer: A
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Find the length of the indicated portion of the curve.r(t) = (etcos t)i + (etsin t)j + 7etk, -ln 2 ? t ? 0
A. 
B. 
C. 
D. 
Solve the problem.Bill Monotone sells CDs for $8.25 each. His initial cost to set up the business was $8100, and each CD costs him $3.50. Express the cost C as a function of x, where x represents the number of CDs sold.
A. C(x) = 8100x + 3.50 B. C(x) = 8100x + 8.25 C. C(x) = 8.25x + 8100 D. C(x) = 3.50x + 8100
Translate the problem to a system of equations and then solve.The sum of two numbers is 72. Four times the larger number minus three times the smaller number is 78. What are the numbers?
A. 26, 46 B. 30, 42 C. 38, 34 D. 26, 39
Simplify the sum.(3x + 4) + (9x - 7)
A. 12x - 3 B. 15x C. -6x + 11 D. 12x + 11