If y varies directly as x, find the direct variation equation for the situation.y = 0.8 when x = 6.4
A. y = 0.125x
B. y = 0.8x
C. y = 8x
D. y = x - 5.6
Answer: A
Mathematics
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Find the particular solution to the given differential equation that satisfies the given conditions.4y''+ 7y' = 0; y = 0 when x = 0, and y= 3 when x = - 
A. y = - 
+ 
e(-7/4)x
B. y = 
- 
e(7/4)x
C. y = 
- 
e(-7/4)x
D. y = - 
+ 
e(7/4)x
Mathematics
Simplify the expression. Assume that all variables are positive when they appear.-
A. -2x18y6 B. 2x6y9 C. 2x6y6 D. 4x6y6
Mathematics
Factor the polynomial completely.2x2 - x - 28
A. (2x + 7)(x - 4) B. (2x + 4)(x - 7) C. (2x - 7)(x + 4) D. (2x - 4)(x + 7)
Mathematics
Find the derivative.y = 6(98x - 4) - 9
A. 72 ln 54 (98x - 4) B. 48 ln 9 (98x - 4) C. 48 ln 54 (98x - 4) D. 72 ln 9 (98x - 4)
Mathematics