Simplify the expression.274/3
A. 729
B. 2187
C. 81
D. 243
Answer: C
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Use the method of undetermined coefficients to solve the differential equation.
+ y = 9x + cos 2x; 
= 0 and y = 9? when x = ?
A. y = -9 sin x - 
cos x + 9x - 
cos 2x
B. y = 9 sin x + 
cos x + 9x - 
cos 2x
C. y = 9 sin x - 
cos x + 9x - 
sin 2x
D. y = 9 sin x - 
cos x + 9x - 
cos 2x
Provide an appropriate response.Factor the special product: x2 + 20xy + 100y2
A. (x + 10y)2 B. (xy + 10)2 C. 20(x2 + xy = 5y2) D. (x + 10y)(x - 10y)
The mean height of kindergartners at an elementary school is 44 inches with a standard deviation of 2 inches. If the heights are normally distributed, use this data to solve the problem. 
What percent of the kindergartners have a height between 42 and 46 inches?
A. 95% B. 68% C. 99.7% D. 34%
Translate the phrase into a mathematical expression and then evaluate it.Sixty divided by five, minus eight
A. 
- 8; 4
B. 
+ 8; 20
C. 
; 20
D. 
; 4