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Delicious77 [7]
3 years ago
9

Which number is a multiple of 9? A:109 B:3 C:27 D:89

Mathematics
2 answers:
frosja888 [35]3 years ago
8 0

Answer:C

Step-by-step explanation:

9 x 3 = 27

svlad2 [7]3 years ago
4 0
The correct answer is c 9 times 3 equals 27
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Choose which one you believe doesn't belong.
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Step-by-step explanation:

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If f(x) = 2x +4, which of the following is the inverse of f(x)?
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solong [7]
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The differential equation y′′=0 has one of the following two parameter families as its general solution: yyyy=C1ex+C2e−x=C1cos(x
svet-max [94.6K]

Answer:

y_c = 2 + 10*x

Step-by-step explanation:

Given:

                                                y'' = 0

Find:

- The solution to ODE such that y(0) = 2, y'(0) = 10

Solution:

- Assuming a solution y = Ce^(mt)

So,                                y' = C*me^(mt)

                                    y'' = C*m^2e^(mt)

- Back substitute into given ODE, we get:

                                    y'' = C*m^2e^(mt) = 0

                                    e^(mt) can not be equal to zero

- Hence,                       m^2 = 0

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- The complimentary function for repeated roots is:

                                    y_c = (C1 + C2*x)*e^(m*t)

                                    y_c = C1 + C2*x  

- Evaluate @ y(0) = 2

                                    2 = C1 + C2*0

                                    C1 = 2

-Evaluate @ y'(0) = 10

                                    y'(t) = C2 = 10

Hence,                         y_c = 2 + 10*x

5 0
3 years ago
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