Determine which ordered pair is a solution of the system.
a. (3, –1)
b. (4, –6)
c. (–4, –6)
d. (–6, –4)
c. (–4, –6)
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Solve the problem.Earth is approximately circular in cross section, with a circumference at the equator of 24,882 miles. Suppose that two ropes are used to create two concentric circles. One is created by wrapping a rope around the equator and the other is created using a rope 48 feet longer. How much space is between the ropes? Round the result to two decimal places. 
A. About 13.37 feet B. About 7.64 feet C. About 40,336.23 feet D. About 6.05 feet
Find a parametrization for the curve.The line segment with endpoints (-3, 1) and (2, 3)
What will be an ideal response?
Complete the identity.1 - cos(2?) + cos(6?) - cos(8?) = ?
A. 4 sin ? sin(3?) sin(4?) B. 4 cos ? cos(3?) sin(4?) C. 4 cos ? cos(3?) cos(4?) D. 4 sin ? cos(3?) sin(4?)
Solve.Molly has $11.85 in coins. She has five more nickels than dimes. She has eight fewer quarters than dimes. How many quarters does she have?
A. 31 quarters B. 39 quarters C. 34 quarters D. 26 quarters