Using the symbols ? (for negation) and ? (for implication), write the contrapositive ofthe implication P ? Q.
What will be an ideal response?
? Q ? ?P
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Solve the given differential equation.
+ 49y = cos 7x
A. y = c1 sin 7x + c2 cos 7x + 
x cos 7x
B. y = c1 sin 7x + c2 cos 7x - 
x sin 7x
C. y = c1 sin 7x + c2 cos 7x + 
x sin 7x
D. y = c1 sin 7x + c2 cos 7x + 
x sin 7x + 
x cos 7x
Use the multiplication property of equality to solve the equation. -k = 21
A. -20 B. 20 C. -21 D. 21
Solve.The cost C of double-dipped chocolate pretzel O's varies directly with the number of pounds of pretzels purchased, P. If the cost is 
when 7.9 pounds are purchased, find a linear function that relates the cost C to the number of pounds of pretzels purchased P. Then find the cost C when 4.7 pounds are purchased.
A. C(P) = 
; $136.18
B. C(P) = 0.098P; $0.46
C. C(P) = 17.238P; $136.18
D. C(P) = 10.256P; $48.20
Express the polynomial in descending order. If the polynomial is already in descending order, so state.2y2 - 6y4 + 3
A. 6y4 + 2y + 3 B. -6y4 + 2y2 + 3 C. -4y6 + 3 D. already in descending order