Solve the system of equations by substitution.5x + 3y = 802x + y = 30
A. (10, 0)
B. (0, 10)
C. (10, 10)
D. (-10, 10)
Answer: C
Mathematics
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Sketch the graph of the parametric equations. Then set up the appropriate integral to find the length of the curve and use a computer to evaluate it.x = 2t cos t, y = 2t sin t, 0 ? t ? 3?
A. L = 20?
B. L = 61.51
C. L = 92.26
D. L = 61.51
Mathematics
Solve.What number added to 54 is 145?
A. 91
B. -91
C. 
D. 199
Mathematics
Reduce the rational expression to lowest terms.
A. 
B. x + 6
C. x - 6
D. 
Mathematics
Solve the problem.A convention manager finds that she has $1340, made up of twenties and fifties. She has a total of 49 bills. How many fifty-dollar bills does the manager have?
A. 37 B. 8 C. 12 D. 49
Mathematics