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spin [16.1K]
3 years ago
6

Plz help. 20 points!!

Mathematics
1 answer:
saw5 [17]3 years ago
6 0
(1) Addition property
(2) Multiplication property
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20 points!<br> I need help (asap!!)
EastWind [94]

Answer:

<h2>x = 5</h2><h2>OB = 36</h2><h2>BE = 54</h2>

Step-by-step explanation:

We know that the medians of the triangle divides in a ratio of 2:1. Therefore we have the equation:

\dfrac{9x-9}{2x+8}=\dfrac{2}{1}                <em>cross multiply</em>

1(9x-9)=2(2x+8)             <em>use distributive property a(b + c) = ab + ac</em>

9x-9=(2)(2x)+(2)(8)

9x-9=4x+16                 <em>add 9 to both sides</em>

9x=4x+25                <em>subtract 4x from both sides</em>

5x=25             <em>divide both sides by 5</em>

\boxed{x=5}

OB=9x-9\to OB=9(5)-9=45-9=\boxed{36}

OE=OB:2\to OE=36:2=18\to BE=BO+OE\to BE=36+18=54


8 0
3 years ago
Solve the system of equations by substitution and show work.<br> ​​y=−6x+13<br> y=3x+4
sukhopar [10]

Answer: x= 1 , y = 7

Step-by-step explanation:

y = -6x + 13 ................. equation 1

y = 3x + 4 ................ equation 2

substitute y = 3x + 4 into equation 1 , then we have

3x + 4 = - 6x + 13

collect the like terms , we have

3x + 6x = 13 - 4

9x = 9

x = 1

substitute x = 1 into equation 2 , we have

y = 3(1) + 4

y = 3 + 4

y = 7

Therefore : x = 1 and y = 7

6 0
3 years ago
Read 2 more answers
Find the slope (-8,10) (8,15)
Novosadov [1.4K]
<h3>Question:</h3>

find the slope (-8,10) (8,15)

<h3>Answer:</h3>

m = \frac{5}{16}

<h3>Step-by-step explanation:</h3>

Use the slope formula \frac{y2-y1}{x2-x1}

(x2,y1) = (-8,10) , (x2,y2) = (8,15)

m = \frac{15-10}{8-(-8)}

m = \frac{5}{16}

Hope this helps :)

Please consider marking my answer brainlist!

7 0
3 years ago
a discount of 15% saved jackie $57 on office supplies. what was the price of the supplies before the discount?
kolbaska11 [484]

Answer:

$38-

Step-by-step explanation:

15% = $57

57 ÷ 3 = 19%

15 ÷ 3 = 5

100 ÷ 5 = 20

19% × 20 = $380

6 0
3 years ago
Find the x-Intercept and the y-Intercept of the line below. Click on "None" if applicable.<br> None
PSYCHO15rus [73]

Answer: X-intercept is (2,0)

Y-intercept is (0,-2)

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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