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poizon [28]
3 years ago
8

Can some one please help me

Mathematics
2 answers:
zalisa [80]3 years ago
6 0

Answer:

A and D

Step-by-step explanation:

When you have an equation that has an x on one side with other things you do the opposite of the thing on the same side as the x. You would add 5 to 17 then you would divide by 4 to seperate the four from the x.

In functions one input has only one output. Since 3 has two outputs it is not a function.

Julli [10]3 years ago
4 0

Answer: Number one is C I believe

Step-by-step explanation: 4x - 5 =7

4x -5 + 5=7+5

     4x=12

4x-4=12 divided by 4

         x= 3

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Crazy boy [7]

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dsp73
For any scalars c_1,c_2, we have

c_1\mathbf v\times c_2\mathbf w=c_1c_2\mathbf v\times\mathbf w

So

\left(-\dfrac34\mathbf v\right)\times\left(-\dfrac12\mathbf w\right)=\dfrac38\mathbf v\times\mathbf w

We have

\mathbf v\times\mathbf w=\begin{vmatrix}\mathbf i&\mathbf j&\mathbf k\\-2&12&-3\\-7&4&-6\end{vmatrix}
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=-60\,\mathbf i-(-9)\,\mathbf j+76\,\mathbf k
=\begin{bmatrix}-60\\9\\76\end{bmatrix}

which makes

\left(-\dfrac34\mathbf v\right)\times\left(-\dfrac12\mathbf w\right)=\dfrac38\begin{bmatrix}-60\\9\\76\end{bmatrix}=\begin{bmatrix}-\frac{45}2\\\\\frac{27}8\\\\\frac{57}2\end{bmatrix}
4 0
3 years ago
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