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Sergeeva-Olga [200]
4 years ago
6

3x = 21 What is the value of x?

Mathematics
1 answer:
ohaa [14]4 years ago
3 0
3x = 21
devide each side by 3

3x = 21
----- ----
3. َ ّ ُّ. 3


x = 7
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Simplify the Expression below (2x^2-5x+6)+(5x^2-3x+4)
tia_tia [17]

Answer: 7x^2-8x+10

Step-by-step explanation: hope this helps gl :)

thx for the points

4 0
3 years ago
Read 2 more answers
What is 45% of 432? and how?
mr Goodwill [35]
1. We assume, that the number 432 is 100% - because it's the output value of the task. 
<span>2. We assume, that x is the value we are looking for. </span>
<span>3. If 432 is 100%, so we can write it down as 432=100%. </span>
<span>4. We know, that x is 45% of the output value, so we can write it down as x=45%. </span>
5. Now we have two simple equations:
1) 432=100%
2) x=45%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
432/x=100%/45%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 45% of 432

432/x=100/45
<span>(432/x)*x=(100/45)*x       - </span>we multiply both sides of the equation by x
<span>432=2.22222222222*x       - </span>we divide both sides of the equation by (2.22222222222) to get x
<span>432/2.22222222222=x </span>
<span>194.4=x </span>
x=194.4

<span>now we have: </span>
<span>45% of 432=194.4</span>
6 0
4 years ago
Read 2 more answers
Select the correct answer.
Maru [420]

The true statement about these graph is that: B. the graph of the original function (y = 8/5x + 4) is perpendicular to the graph of the new function (y =- 5/8x + 8).

<h3>What is a graph?</h3>

A graph can be defined as a type of chart that's commonly used to for the graphical representation of data on both the horizontal and vertical lines of a Cartesian coordinate, which are typically known as the x-axis and y-axis respectively.

<h3>How to interpret the graph?</h3>

Mathematically, the standard form of the equation of a straight line on a graph is given by;

y = mx + c

<u>Where:</u>

  • x and y are the points.
  • m is the slope.
  • c is the intercept.

<h3>The condition for perpendicularity.</h3>

In Mathematics, the condition for perpendicularity of two (2) lines is as follows:

m₁ × m₂ = -1

8/5 × (-5/8) = -1

Based on the graph (see attachment) of the original function and new function, we can infer and logically deduce that the true statement about their graph is that the graph of the original function (y = 8/5x + 4) is perpendicular to the graph of the new function (y =- 5/8x + 8).

Read more on perpendicularity here: brainly.com/question/1202004

#SPJ1

Complete Question:

Suppose the following function is graphed. y = 8/5x + 4 On the same grid, a new function is graphed. The new function is represented by the following equation. y =- 5/8x + 8. Which of the following statements about these graphs is true?

A. The graphs intersect at (0,8).

B. The graph of the original function is perpendicular to the graph of the new function.

C. The graph of the original function is parallel to the graph of the new function.

D. The graphs intersect at (0,4).

3 0
2 years ago
10 . 10 . 20 +123456798
Mashcka [7]

Answer:

123,458,798

Step-by-step explanation:

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3 years ago
You are at the store you buy a jacket that is regularly priced at $84 it is on sale for 30% off. When you take it up to the cash
Zepler [3.9K]
$63.54 is the price after the discount and tax
4 0
3 years ago
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