Solve the system by substitution. If the system is inconsistent and has no solution, state this. If the system is dependent, write the form of the solution for any real number x.8x + 5y = -22- 
x + y = - 
A. (1, -6)
B. (-1, -6)
C. (6, 1)
D. (-6, 1)
Answer: A
Mathematics
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(t) for the function given.
r(t) = 2i+sintj+costk
Mathematics
Solve the inequality. Express your answer using interval notation.
-1/2 > 0
A. (8, ?)
B. [8, ?)
C. (- ?, 8)
D. (- ?, 8]
Mathematics
Find the indicated derivative.Find y(4) if y = -9 cos x.
A. y(4) = -9 cos x B. y(4) = -9 sin x C. y(4) = 9 sin x D. y(4) = 9 cos x
Mathematics
Solve the problem.Vince's grocery bill was $9.95. He gave the clerk a $20 bill. How much change should he receive?
A. $10.05 B. $9.05 C. $10.04 D. $9.95
Mathematics