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Andrej [43]
3 years ago
11

Help solve this equation

Mathematics
1 answer:
Sveta_85 [38]3 years ago
3 0

Answer:

If you're supposed to use elimination to find (x, y) the answer is (6, 1)

Step-by-step explanation:

Add:

2x+3y=15

  x-3y= 3

y cancels out and left with...

2x=15

  x=3

that becomes

3x=18

find x

18/3= 6

x=6

Then plug in x (which is 6) to one of the equations to solve for y

6- 3y= 3

-3y= 3-6

-3y= -3

y= 1

(x, y) equals (6, 1)

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Use the slope formula below:

\large \boxed{m =  \frac{y_2 - y_1}{x_2 - x_1} }

The m-term represents the slope.

The formula is the changes of two y-points over the changes of two x-points. We are given two points. Substitute both points in the formula.

\large{m =  \frac{9 - ( - 7)}{ - 2 - 4} } \\  \large{m =  \frac{9 + 7}{ - 6}  \longrightarrow  \frac{16}{ - 6} } \\  \large{m =  \frac{8}{ -3 }  \longrightarrow  -  \frac{8}{3} }

Therefore the slope is -8/3

Answer

  • the slope is -8/3

Hope this helps! Let me know if you have any doubts.

6 0
3 years ago
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In 1980 the median age of a resident of the united state was 30 years. By 2000 the median age had increased 5.3 years. What was
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Answer:

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Step-by-step explanation:

Given :

In 1980 the median age of a resident of the united state was 30 years.

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Hence the median age of a resident of the United States in year 2000=35.3 years

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