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2 years ago

Which equation represents the line that passes through the points (–3, 7) and (9, –1)?

Mathematics

2 answers:

galben [10]2 years ago

7 0

Answer:

Step-by-step explanation:

first, we find the slope

slope = (y2 - y1) / (x2 - x1)

(-3,7)....x1 = -3 and y1 = 7

(9,-1)...x2 = 9 and y2 = -1

now we sub

slope(m) = (-1 - 7) / (9 - (-3) = -8 / (9 + 3) = -8 / 12 reduces to - 2/3

y = mx + b

slope(m) = -2/3

use either of ur points...I will use (-3,7)...x = -3 and y = 7

now we sub and find b, the y intercept

7 = -2/3(-3) + b

7 = 2 + b

7 - 2 = b

5 = b

so ur equation is : y = -2/3x + 5 <===

shtirl [24]2 years ago

6 0

Answer:

y = -2/3x + 5

Step-by-step explanation:

just took the test

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3 years ago

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3 years ago

A collector has 100 movie posters and 80 band posters. She wants to sell 30 movie posters but still have her poster collection m

umka2103 [35]

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Step-by-step explanation:

First take the expression down to its simplest form;

= 5:4

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= 100 - 30

= 70 movie posters

We need a number of band posters remaining that will give a ratio of 5:4 with movie posters.

In fraction form, the number of movie posters is;

= 5/9 because 9 would be the total number of both movie posters and band posters.

Create an expression to find the total number of posters if 70 are movie posters;

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2 years ago