Perform the indicated operation and write the answer in simplest form.- 
? - 
A. - 
B. 
C. 
D. - 
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. 
= Qh - Qc
C. 
= 
D. 
= 
Provide an appropriate response.Look for a pattern in the sequence of figures shown below. How many triangles are needed for the 4th figure? The nth figure?
A. 12, 3n B. 14, 4n - 2 C. 14, 3n + 2 D. 12, 4n - 4
Find any missing lengths in the similar figures.
A. x = 22.5 B. x = 24 C. x = 13.5 D. x = 18
Solve by graphing. Label the axes and show where the solution is located on the graph.The cost, c, in dollars of car rental is given by the linear equation c = 4 + 0.25m, where m is the number of miles driven. (a) Sketch the graph of the equation.
(b) Find the missing coordinate for the ordered pair 
(c) Interpret the point from part (b).(d) Find and interpret the y-intercept.
A. (a)
(b) (26, 11); (c) It would cost $11 to rent
a car if you drive 26 miles.; (d) The
y-intercept, (0, 4), indicates that it
would cost $4 to rent a car without
driving it at all 
B. (a)
(b) (26, 16); (c) It would cost $16 to rent
a car if you drive 26 miles.; (d) The
y-intercept, (0, 7), indicates that it would
cost $7 to rent a car without driving
it at all 
C. (a)
(b) (26, 27); (c) It would cost $27 to
rent a car if you drive 26 miles.; (d) The
y-intercept, (0, 0), indicates that it would
cost $0 to rent a car without driving
it at all 
D. (a)
(b) (26, 7); (c) It would cost $7 to rent
a car if you drive 26 miles.; (d) The
y-intercept, (0, 0), indicates that it would
cost $0 to rent a car without driving
it at all 