Simplify. Write the answer as a mixed number as needed.
+
2- 
A. 5
B. 
C. 7
D. 
Answer: C
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Solve the given differential equation. (The form of yp is given.)D2y - 2Dy + y = x2 + 2x + sin 2x(Let yp = Ax2 + Bx + C + E sin 2x + F cos 2x.)
A. y = c1ex + c2xex + 6x2 + 6x + 10 sin 2x + 
cos 2x
B. y = c1ex + c2xex + 6x2 + 6x + 10 + 
sin 2x + 
cos 2x
C. y = c1ex + 6x2 + 6x + 10 - 
sin 2x + 
cos 2x
D. y = c1ex + c2xex + 6x2 + 6x + 10 - 
cos 2x + 
sin 2x
Multiply or divide as indicated. Write the answer in lowest terms.
? 
A. 
B. 
C. 
D. 
Find a formula for the inverse of the function described below.32° Fahrenheit = 0° Celsius. A function that converts temperatures in Celsius to those in Fahrenheit is 
.
A. f-1(x) = x + 32
B. f-1(x) = 
x + 32
C. f-1(x) = 
(x + 32)
D. f-1(x) = 
(x - 32)
Solve the equation by factoring.4x2 - 20 = 0
A. {-5, 5}
B. {10}
C. {-
, 
}
D. {6}