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3 years ago

DON'T ANSWER FREE POINTSSSS

Mathematics

2 answers:

kumpel [21]3 years ago

6 0

Answer:

Step-by-step explanation:

steposvetlana [31]3 years ago

3 0

Answer:

$\boxed{n = -13 - 4i}$

Step-by-step explanation:

$\text{Assuming } i=\sqrt{-1}$

$(13 + 4i) + n = 0$

$n = -(13 + 4i)$

$\boxed{n = -13 - 4i}$

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Jannie has a budget of $240 to spend on jeans and shirts. She spends $95 on jeans. If the cost of each shirt is $22.50, how many

marysya [2.9K]

240-95=145
145÷22.50=6.44444
OR about 6 shirts

6 0

3 years ago

Find the value of x and y and please show all work.

elena55 [62]

Answer:

x=66

y=48

Step-by-step explanation:

because the two length is same, so the angle x= 66 will be same; y= 180-66-66=48

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3 years ago

Read 2 more answers

Integrate e^x(sin(x) cos(x))

Karo-lina-s [1.5K]

$I=\int e^x(\sin(x)\cos(x))dx=\int e^x(\frac{1}{2}\sin(2x))dx=\frac{1}{2}\int e^x\sin(2x)dx$

$\text{If }u=\sin(2x)\to du=2\cos(2x)dx~\text{and}~dv=e^xdx\to v=e^x:\\\\
\text{Using }\int u\,dv=uv-\int v\,du:\\\\
I=\frac{1}{2}(e^x\sin(2x)-\int e^x(2\cos(2x))dx)\\\\
2I=e^x\sin(2x)-2\underbrace{\int e^x\cos(2x)dx}_{I_2}$

Looking for $I_2$ :

$\text{If}~u=\cos(2x)\to du=-2\sin(2x)dx~\text{and}~dv=e^xdx\to v=e^x:\\\\
I_2=e^x\cos(2x)-\int e^x(-2\sin(2x))dx\\\\ I_2=e^x\cos(2x)+2\int e^x(\sin(2x))dx\\\\ I_2=e^x\cos(2x)+2\int e^x(2\sin(x)\cos(x))dx\\\\ I_2=e^x\cos(2x)+4\int e^x(\sin(x)\cos(x))dx=e^x\cos(2x)+4I$

Replacing:

$2I=e^x\sin(2x)-2I_2\iff\\\\2I=e^x\sin(2x)-2(e^x\cos(2x)+4I)\iff\\\\
2I=e^x\sin(2x)-2e^x\cos(2x)-8I\iff\\\\
10I=e^x\sin(2x)-2e^x\cos(2x)\iff\\\\
I=\dfrac{e^x}{10}(\sin(2x)-2\cos(2x))\\\\
\boxed{\int e^x(\sin(x)\cos(x))dx=\dfrac{e^x}{10}(\sin(2x)-2\cos(2x))+C}$

6 0

3 years ago

Factor completely. 15x^2y^2-3x^3y+75x^4

olga_2 [115]

15x2y2+3x3y+75x4 Final result : 3x2 • (25x2 + xy + 5y2)

Step by step solution :Step 1 :Equation at the end of step 1 : (((15•(x2))•(y2))+((3•(x3))•y))+(3•52x4) Step 2 :Equation at the end of step 2 : (((15•(x2))•(y2))+(3x3•y))+(3•52x4) Step 3 :Equation at the end of step 3 : (((3•5x2) • y2) + 3x3y) + (3•52x4) Step 4 :Step 5 :Pulling out like terms :

5.1 Pull out like factors :

 75x4 + 3x3y + 15x2y2 = 3x2 • (25x2 + xy + 5y2)

Trying to factor a multi variable polynomial :

5.2 Factoring 25x2 + xy + 5y2

Try to factor this multi-variable trinomial using trial and error

Factorization fails

Final result : 3x2 • (25x2 + xy + 5y2)

7 0

3 years ago

Please answer this math question correctly..BRAINLY FOR CORRECT

icang [17]

Im not giving out direct answers cause math is my weak point but to find the volume multiply the width with the length and with the height all together to find it.

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3 years ago