Translate to an equation, then solve.Twenty-seven less than eight times a number is equal to five.
A. 27 + 8n = 5, n = -4
B. 27 - 8n = 5, n = 3
C. 8n + 27 = -5, n = -4
D. 8n - 27 = 5, n = 4
Answer: D
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Find the value of the expression. Give the result as a decimal.
2 + (5.9)(3.4)
A. 20.071 B. 21.15 C. 20.171 D. 20.15
Find the derivative of y.y = 2t3 tanh 
A. 6t2 tanh 
- 4 sech2 
B. 6t2 tanh 
- 2 sech2 
C. 6t2 tanh 
- 4 sech 
D. 6t2 tanh 
+ 4 sech2 
Solve the problem.A company knows that the unit cost C and the unit revenue R from the production and sale of x units are related by 
Find the rate of change of unit revenue when the unit cost is changing by 
and the unit revenue is $4000.
A. $238.30/unit B. $334.40/unit C. $280.00/unit D. $430.50/unit
State the value of the discriminant and the number of real solutions.5x2 - 20 = 0
A. 400, one B. 400, two C. 0, one D. -400, two