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Volgvan
3 years ago
13

5. Write an equation of the line that passes through (4,−1) and is parallel to the line y=3x+7.

Mathematics
1 answer:
k0ka [10]3 years ago
7 0

Answer:

y =3x-1

Step-by-step explanation:

Parallel lines have the same slope, but different y intercepts :)

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Step-by-step explanation:

First I found the slope by using the the definition that slope is rise/run so I saw that the y value went up from 4 to 9 which is 5 units and then the x value went up one in that same time. This means that the slope is 5/1. Then I found the y intercept by seeing where x = 0. On the graph you can see the line touches the y - axis at a value of 4 which means that the y - intercept is 4. Plugging these values into the y = mx + b equation you get y = 5x + 4.

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50 POINTS! I MARK BRAINLEST AND SAY THANKS!
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Y *x =20

y +x =9

rewrite 1st eq. as y = 20/x

subsituute that into 2nd eq.

20/x +x =9

multiply each term by X

20 +x^2 = 9x
 subtract 9x from each side:

x^2 - 9x +20 = 0

now factor:

(x-5) (x-4) = 0

solve for x
5-5 = 0
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so X can be 4 or 5

replace x into equations and solve for Y

 so when X = 4, Y = 5
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x= 5,4
y = 4,5



5 0
3 years ago
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