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Natasha_Volkova [10]
3 years ago
14

What is the vale of x?

Mathematics
2 answers:
dimaraw [331]3 years ago
4 0
Since the triangles are similar, the following is true:

  20        x+6
------- = -------
2x -6       36

Then (20)(36) = (x+6)(2)(x-3) = 2[x^2+3x-18], or

720 = 2[x^2+3x-18], or 360 = x^2 + 3x - 18.

Then x^2 + 3x - 18 - 360 = 0.  This is a quadratic equation which can be solved using the quadratic formula, among other approaches.  Please apply the quadratic formula here, using a=1, b=3 and c= -378, to find x.
sertanlavr [38]3 years ago
4 0
Since they are similar
36/x+6=2x-6/20
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1/3y+1/4=5/12 i need 20 character
lys-0071 [83]
Y/3 + 1/4 = 5/12
4y/12 + 3/12 = 5/12
           4y/12 = 2/12
                4y = 2
                /4     /4
                  y = 1/2

Therefore y = 1/2

3 0
2 years ago
Pls help I really need help pls I need Profesional at math pls pls ​
Rzqust [24]

I think $6.75 for 15 juice boxes is better because, each juice box is 0.45.

While $5.50 for 11 juice boxes is 0.50.

And if we were to add 0.50 enough times to make 15 juice boxes it would equal 7.50

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THE SECOND ONE IS A WAY BETTER OF A DEAL

4 0
2 years ago
Help please!!!!!!!!!
SOVA2 [1]
Find the area of the triangles and smal ler square and add them together ; and find the area of the complete square and set them equal to each other (these are known truths)
triangle: l×w /2
square: s^2
There are 4 triangles so

4 (1/2ab)+c^2= (a+b)(a+b)
simplify

2ab+c^2= a^2+2ab+b^2
-2ab both sides

c^2=a^2+b^2

tada!! it's proven :)
6 0
3 years ago
A towns population went from 25,800 to 42600 what was the percent of change
ivolga24 [154]
About 165.1% increase
8 0
2 years ago
Read 2 more answers
Consider a game board that has 49 squares. You place 1 grain of wheat on the first square, 2 on the next, 4 on the next, 8 on th
Art [367]

Answer:

2^0+2^1+2^2+...+2^49

Step-by-step explanation:

1=2^0

2=2^1

4=2^2

8=2^3

and so on

5 0
2 years ago
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