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Fofino [41]
3 years ago
15

Select the correct answer.

Mathematics
2 answers:
Marina CMI [18]3 years ago
8 0

Answer:

Step-by-step explanation:

D

leonid [27]3 years ago
3 0

Answer: the Answer is A'(-30, -12) and C"(-4, -6)

the Answer is D i took the test

Step-by-step explanation:

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(×2+1)(x3+2x)(x2+4x-16i-4xi) Solve for the roots in equation
NISA [10]
\bf (x^2+1)(x^3+2x)(x^2+4x-16i-4xi)=0\\\\
-------------------------------\\\\
x^2+1=0\implies x^2=-1\implies x=\sqrt{-1}\implies x=i\\\\
-------------------------------\\\\
x^3+2x=0\implies x(x^2+2)=0\implies 
\begin{cases}
x=0\\
-------\\
x^2+2=0\\
x^2=-2\\
x=\sqrt{-2}\\
x=\sqrt{2\cdot -1}\\
x=\sqrt{2}\cdot \sqrt{-1}\\
x=i~\sqrt{2}
\end{cases}\\\\
-------------------------------\\\\

\bf x^2+4x-16i-4xi=0\implies (x^2+4x)~-~(16i+4xi)=0
\\\\\\
(x^2+4x)~-~(4xi+16i)=0\implies x(x+4)~-~4i(x+4)=0
\\\\\\
\stackrel{common~factor}{(x+4)}(x-4i)=0\implies 
\begin{cases}
x+4=0\\
x=-4\\
-----\\
x-4i=0\\
x=4i
\end{cases}
7 0
3 years ago
Please Help!!! "What is the area of trapezoid ABCD? Enter your answer as a decimal or whole number in the box. Do not round at a
Alexxx [7]
To find the length of each side of the trapezoid, you need to use the distance formula.
AB = (-3,2) and (1,5)
BC = (1,5) and (7,-3)
CD = (7, -3) and (0, -2)
AD or DA = (0,-2) and (-3,2)
Now, just use the distance formula for each line. Doing so gives us:
AB = 5
BC = 10
CD = 7.071107...
DA or AD = 5
The height is AB, the first base is BC and the second base is CD. We can plug the values for these sides into the trapezoid area formula, which is A = base 1 + base 2 all over 2 times the height. Doing so gives us 37.5 units². Therefore, the answer to your query is 37.5 units². Hope this helps and have a nice day!
3 0
3 years ago
Read 2 more answers
Kamal wrote the augmented matrix below to represent a system of equations
Alina [70]

Consider the operation is R_2\to -3R_2.

Given:

The augmented matrix below represents a system of equations.

\left[\left.\begin{matrix}1&0&1\\1&3&-1\\3&2&0\end{matrix}\right|\begin{matrix}-1\\-9\\-2\end{matrix}\right]

To find:

Matrix results from the operation R_2\to -3R_2.

Step-by-step explanation:

We have,

\left[\left.\begin{matrix}1&0&1\\1&3&-1\\3&2&0\end{matrix}\right|\begin{matrix}-1\\-9\\-2\end{matrix}\right]

After applying R_2\to -3R_2, we get

\left[\left.\begin{matrix}1&0&1\\-3(1)&-3(3)&-3(-1)\\3&2&0\end{matrix}\right|\begin{matrix}-1\\-3(-9)\\-2\end{matrix}\right]

\left[\left.\begin{matrix}1&0&1\\-3&-9&3\\3&2&0\end{matrix}\right|\begin{matrix}-1\\27\\-2\end{matrix}\right]

Therefore, the correct option is A.

7 0
3 years ago
-6x +3 3/4 + 14x - 3.25
Nataly_w [17]

Answer:

8x +5

Step-by-step explanation:

that's what I got.................

4 0
2 years ago
Read 2 more answers
Please help me with this (5th grade math)
Tanya [424]

Answer:

kenis

Step-by-step explanation:

3 0
3 years ago
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