Find the value of the expression. Give the result as a decimal.
(-9.5 - 3.8)
A. -39.9
B. -6.967
C. -4.433
D. -51.87
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. 
= 
D. 
= 
John and Rosamond want to retire in 8 years and can save $230 every three months. They plan to deposit the money at the end of each quarter into an account paying 7.42% compounded quarterly. How much will they have at the end of 8 years? ? Please round the answer to the nearest cent. ? $ __________
Fill in the blank(s) with the appropriate word(s).
Solve the problem.An organization determines that the cost per person of chartering a bus is given by the formula 
where x is the number of people in the group and C(x) is in dollars. Find the inverse function.
A. C-1(x) = 
B. C-1(x) = 
C. C-1(x) = 
D. C-1(x) = 
Find the GCF of the terms in the polynomial.7x8 - 5x7 + 7x
A. x B. 7x4 C. x4 D. 5x