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insens350 [35]
3 years ago
5

2 x - 5 ( 5 - x ) = 24

Mathematics
1 answer:
alex41 [277]3 years ago
6 0
X=7 because you have to distribute the negative five to the 5-x in the parenthesis.

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What is the answer a, b, c, or d
podryga [215]

Answer: Choice B

(-2, 5)

==================================================

Explanation:

The original system is

\begin{cases}-4x+3y = 23\\ x-y = -7\end{cases}

Multiply both sides of the second equation by 3. Doing so leads to this updated system of equations

\begin{cases}-4x+3y = 23\\ 3x-3y = -21\end{cases}

Now add straight down

The x terms add to -4x+3x = -1x = -x

The y terms add to 3y+(-3y) = 0y = 0

The terms on the right hand sides add to 23+(-21) = 2

We end up with the equation  -x = 2 which solves to x = -2

Now use this to find y. You can pick any equation with x,y in it

----------------

-4x+3y = 23

-4(-2)+3y = 23

8+3y = 23

3y = 23-8

3y = 15

y = 15/3

y = 5

Or

x-y = -7

-2-y = -7

-y = -7+2

y = -5

y = 5

Either way, we get the same y value.

So that's why the solution is (x,y) = (-2, 5)

6 0
2 years ago
Helpppppppp??????????
Alexxx [7]

Answer:

<em>Answer is option d</em><em> </em>

<em>Answer is </em><em>given below with explanations</em><em>. </em>

Step-by-step explanation:

We can prove that the two triangles are similar.

We can prove this using AA criterion of similarity.

In triangle DNC and triangle QSC

Vertically opposite angles are equal.

Then Angle QCS = Angle DCN

Two parallel lines cut by a transversal line make the alternate angles are equal.

Then Angle NDC = Angle CQS

By AA criterion of similarity

TRIANGLE DNC ~ TRIANGLE QSC

<em>HAVE A NICE DAY</em><em>!</em>

<em>THANKS FOR GIVING ME THE OPPORTUNITY</em><em> </em><em>TO ANSWER YOUR QUESTION</em><em>. </em>

8 0
3 years ago
Read 2 more answers
What is the sqaure of <br>3<br>4<br>and<br>5​
sveticcg [70]

Answer:

Do you mean what is the square root?

Step-by-step explanation:

1.73205080757

2

2.2360679775

Just find something close if those aren't answer choices

8 0
2 years ago
What is the length of line tAH
TEA [102]
It is 27 or less for tah
8 0
2 years ago
Read 2 more answers
Write a + - x or ÷ sign in each box to make the equation true <br><br> 7 18 45 3 2 = 139
irina [24]
I mean, I don't know how to explain a generic way to solve this. Ask me about the specific train of thought if you are interested:

7 * 18 + 45 / 3 - 2 = 139
4 0
3 years ago
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