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natali 33 [55]
4 years ago
9

Can someone please help me?

Mathematics
1 answer:
Nookie1986 [14]4 years ago
8 0

Answer:

-3 • (x - 7)

Step  1  :

6x -  3 • (3x - 7)

Step 2:

21 - 3x  =   -3 • (x - 7)

Final result :

-3 • (x - 7)

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Solve by graphing <br><br> u=v and 6u=2v-24
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Answer:

u=-6 \\ \\ v=-6

Step-by-step explanation:

In this exercise, we have two equations, namely:

u=v \ and \ 6u=2v-24

And we are asked to solve this problem by graphing. In this way, we can write a system of linear equations in two variables, but first of all, let's rewrite:

u=y \\ \\ v=x

Then:

\left\{ \begin{array}{c}y=x\\6y=2x-24\end{array}\right.

So here we have two lines.

The first one is:

\boxed{y=x}

This line passes through the origin and has a slope m=1

The second one is:

6y=2x-24 \\ \\ \therefore y=\frac{2x-24}{6} \\ \\ \therefore \boxed{y=\frac{1}{3}x-4}

This line has a slope m=\frac{1}{3} and cuts the y-axis at b=-4

By using graph tools, we get the graph shown below, then:

x=-6 \\ \\ y=-6 \\ \\ \\ Since \ u=y \ and \ v=x, then: \\ \\ u=-6 \\ \\ v=-6

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3 years ago
9 is the difference of a number n and 7.
Dmitry_Shevchenko [17]
N-7=9 should be the answer
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