Multiply and simplify.18 
A. 
B. -162
C. -2
D. 2
Answer: C
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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. 
= 
Write an equation of the line through the given point with the given slope. Write the equation in slope-intercept form.(7, -1); slope: - 
A. y = - 
x + 
B. y = - 
x + 
C. y = 
x - 
D. y = - 
x + 5
Complete.9.45 m = 
cm
A. 94.5 B. 945 C. 0.0945 D. 0.945
Describe the transformations that produce the graph of g from the graph of f.
; g(x) = -8|x|
A. Stretch horizontally by a factor of 8. Reflect it across the x-axis. B. Stretch vertically by a factor of 8. Reflect it across the y-axis. C. Stretch horizontally by a factor of 8. Reflect it across the y-axis. D. Stretch vertically by a factor of 8. Reflect it across the x-axis.