Evaluate, if possible-
A. 10
B. -10
C. Not a real number
D. -50
Answer: B
Mathematics
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Solve the problem.In 1995 the United States recovered 21% of its municipal solid wastes through recycling, up from 17% in 1990. Let y represent the percentage recycled and x the number of years since 1990. Find a linear equation that fits this data.
A. y = 0.4x - 17 B. y = 0.8x + 17 C. y = 0.8x + 24 D. y = -0.8x + 7
Mathematics
Find the eigenvalues and the corresponding eigenvectors 
What will be an ideal response?
Mathematics
Add as indicated.(r + 3s + 5) + (4r + s) + (s + 5)
A. 4r + 3s + 10 B. 5r + 5s + 10 C. 5r + 4s + 10 D. 3r + 5s + 10
Mathematics
Evaluate.
, for x = 10 and y = 53
A. 6 B. 7 C. 5 D. 8
Mathematics