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ad-work [718]
3 years ago
9

Solve the system of equations below by elimination.

Mathematics
1 answer:
makvit [3.9K]3 years ago
7 0

21

Step-by-step explanation:

so you add 7 by 20 then answer ×I =

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If
Leno4ka [110]

Answer:

\frac{s^2-25}{(s^2+25)^2}

Step-by-step explanation:

Let's use the definition of the Laplace transform and the identity given:\mathcal{L}[t \cos 5t]=(-1)F'(s) with F(s)=\mathcal{L}[\cos 5t].

Now, F(s)=\int_0 ^{+ \infty}e^{-st}\cos(5t) dt. Using integration by parts with u=e^(-st) and dv=cos(5t), we obtain that F(s)=\frac{1}{5}\sin(5t)e^{-st} |_{0}^{+\infty}+\frac{s}{5}\int_0 ^{+ \infty}e^{-st}\sin(5t) dt=\int_0 ^{+ \infty}e^{-st}\sin(5t) dt.

Using integration by parts again with u=e^(-st) and dv=sin(5t), we obtain that

F(s)=\frac{s}{5}(\frac{-1}{5}\cos(5t)e^{-st} |_{0}^{+\infty}-\frac{s}{5}\int_0 ^{+ \infty}e^{-st}\sin(5t) dt)=\frac{s}{5}(\frac{1}{5}-\frac{s}{5}\int_0^{+ \infty}e^{-st}\sin(5t) dt)=\frac{s}{5}-\frac{s^2}{25}F(s).

Solving for F(s) on the last equation, F(s)=\frac{s}{s^2+25}, then the Laplace transform we were searching is -F'(s)=\frac{s^2-25}{(s^2+25)^2}

3 0
3 years ago
Apologize If i keep spamming this question, I just really need help
AlladinOne [14]

Answer:

C , 18

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Write a description of -5a + 3 > 1 inequality
Andrej [43]

The sum of -5a and 3 is greater than 1

6 0
2 years ago
Kayla flips a quarter 200 times. She expects that
ehidna [41]

Answer:

Experimental probability is likely to be slightly different from theoretical probability.

Step-by-step explanation:

This is because there is a 50-50 chance, but it is unlikely to be exactly 100-100. That is just to hypothesis!

7 0
2 years ago
Question:<br> a=-4,(3,0),(-8,0)
s2008m [1.1K]

Answer:

the y intercept are 0,0 the x intercepts are -8 '3

Step-by-step explanation:

remember solpe equal rise over run an m = x2 - x1

over

y2 - y1

8 0
2 years ago
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