Solve the system of equations.-x + 2y= -7x- z= 0y + z= -2
A. No solution
B. (3, -2, 3)
C. (2, -4, 2)
D. (1, -3, 1)
Answer: D
Mathematics
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Solve the quadratic equation by completing the square.y2 + 1 = ay
A. 0, a
B. 
± 
C. 
± 
D. 
± 
Mathematics
Find the average value of the function f over the given region.f(x, y) = e2x; R = 
A. 
B. 
C. e - 1
D. 2e - 1
Mathematics
Solve.A truck engine is rated at 186 hp and is found to deliver only 101 hp to the transmission. What is the efficiency of the process to the nearest tenth of a percent?
A. 184.1% B. 53.4% C. 181.4% D. 54.3%
Mathematics
Subtract.
- (-5)
A. - 
B. 
C. 
D. - 1
Mathematics