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Maru [420]
3 years ago
14

PLEASE HELP!!!!! What is ​ BC ​? Enter your answer in the box. units

Mathematics
2 answers:
Gelneren [198K]3 years ago
8 0

We are given an isosceles triangle ABC. Where AB = AC.

AB = 8x -4

AC = 5x +11.

BC = 4x -2

We need to find the length of BC.

We have AB = AC.

Therefore,

8x -4  = 5x +11.

Let us solve it for x now.

Adding 4 on both sides, we get

8x -4+4  = 5x +11+4.

8x = 5x +15.

Subtracting 5x from both sides, we get

8x -5x = 5x-5x +15

3x = 15.

Dividing both sides by 3, we get

3x/3 = 15/3

x = 5.

<h3>Plugging x=5 in BC = 4x -2 .</h3>

BC = 4(5) -2 = 20-2 =18.

<h3>Therefore, length of BC is 18 units.</h3>
Nonamiya [84]3 years ago
5 0
8x - 4 = 5x + 11 \\ 3x = 15 \\ x = 5

Substitute that into 4x - 2,
4(5) - 2 \\ = 20 - 2 \\ = 18

Answer : BC = 18

Hope this helps. - M
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What is the general term equation, an, for the arithmetic sequence 5, 1, −3, −7, . . . , and what is the 21st term of this seque
Sonja [21]
The general term is obtained by starting with the initial value 5 and then subtracting 4 each time you wish to generate a new term:

a2 = second term = 5+(2-1)(-4)       =    5+(-4) = 1

General term:

an = nth term = 5+(n-1)(-4)

Thus, the 21st term is 5+(21-1)(-4) = 5 + (20)(-4) = -75 (answer)
6 0
3 years ago
At a football stadium, 25% of the fans in attendance were teenagers. If there were 130 teenagers at the football stadium, what w
Trava [24]

Answer:

Total number of people in the stadium = 520

Step-by-step explanation:

Let the total number of people in the stadium = x

Since, 25% of the fans are teenagers, number of teenagers in the stadium

= 25% of x

= \frac{25}{100}\times x

= 0,25x

If the number of teenagers in the stadium = 130

0.25x = 130

x = \frac{130}{0.25}

x = 520

Therefore, total number of fans in the stadium = 520.

3 0
4 years ago
Which is an equivalent form of the following equation? A=bh/2
Afina-wow [57]
Good question

It seems that it needs to solve for "h"

Right....


<span>A=bh/2      *2
2A = bh      </span>÷b
2A/b = h

h=\frac{2A}{b}


hope you can pick the correct chocie
6 0
3 years ago
Which region on the unit circle contains a cube root of - 8 - 8i
ira [324]

Answer:

A. in quadrant l

Step-by-step explanation:

Edge 2020

7 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=%20-%20x%20%5E%7B2%7D%20%20%2B%202x%20-%206%20%3D%200" id="TexFormula1" title=" - x ^{2} + 2x
Nimfa-mama [501]

Answer:

there are several methods to "solve a quadratic"

you can look them all up...

Graphing, factoring, completing the square, taking roots, quadratic formula are the common methods....

given the way you are asking the question I think that you are supposed to use the quadratic formula ..

please look at the image of the formula and

realize that you problem has

a=-1

b=2

c=6

just plug in those numbers into the formula and you will get the results in the "answer"

NOTE \sqrt{-x} is written as ix ( \sqrt{-25}  = 5i )

Step-by-step explanation:

x= <u>-2+√ (2)²- (4)(-1)(-6)  </u>

                 (2)(-1)  

and

x= <u>-2-√ (2)²- (4)(-1)(-6)  </u>

             (2)(-1)  

8 0
3 years ago
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