Solve the equation.
+ 
= 
A. 0
B. 20
C. 12
D. 60
Answer: A
Mathematics
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Graph the system of inequalities.y ? |x + 6|y ? 3
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A heat engine is a device that converts thermal energy into other forms. The thermal efficiency, e, of a heat engine is defined by 
where Qh is the heat absorbed in one cycle and Qc, the heat released into a reservoir in one cycle, is a constant. Find 
.
A. 
= 
B. 
= - 
C. 
= Qh - Qc
D. 
= 
Mathematics
An ellipsoid is created by rotating the ellipse 4x²+y²=16 about the x-axis. Find the equation of the ellipsoid.
What will be an ideal response?
Mathematics
Use the properties of determinants to find the value of the second determinant, given the value of the first.
= -26
= ?
A. 78 B. 26 C. -78 D. -26
Mathematics