Multiply both sides of each equation by a common denominator to eliminate the fractions. Then solve the system.
- 
= - 
= 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find the torsion of the space curve.r(t) = (6t sin t + 6 cos t)i + (6t cos t) - 6 sin t)j - 6k
A. ? = 0 B. ? = 1 C. Undefined D. ? = -1
Mathematics
Solve.When Milo got promoted at work, he received a 20% pay raise. He now earns 
per year. What was his annual salary before his raise?
A. $62,400 B. $52,000 C. $12,480 D. $10,400
Mathematics
Write the given number in the situation as an integer.The height of the mountain was 11,091 feet.
A. 11,091 feet B. -11,091 feet
Mathematics
Solve the problem.What is the y-intercept of y = cos x?
A. ?
B. 0
C. 1
D. 
Mathematics