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vodomira [7]
3 years ago
12

Line JK passes through points J(–3, 11) and K(1, –3). What is the equation of line JK in standard form?

Mathematics
2 answers:
iren [92.7K]3 years ago
8 0
Y=-7/2x+1/2
1. find slope
2. plug in slope to y=mx+b
3. take point and plug it in (find a b)
4. plug in slope and b to get equation
Arisa [49]3 years ago
3 0

Answer:

\text{The equation is }\frac{14}{4}x+y=1.05

Step-by-step explanation:

Given that line JK passes through points J(–3, 11) and K(1, –3).

we have to find the equation of JK in standard form.

\text{The slope of line joining the points }(x_1,y_1)\text{ and }(x_2, y_2)\text{ is given by}

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

Line JK passes through points J(–3, 11) and K(1, –3).

m=\frac{-3-11}{1-(-3)}

m=\frac{-14}{4}

Put in slope intercept form

y=mx+b

11=\frac{-14}{4}(-3)+b

11\times \frac{4}{42}=b

b=1.05

The equation is

y=\frac{-14}{4}x+1.05

\frac{14}{4}x+y=1.05

which is required form.

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2 years ago
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3 years ago
Statements that are true for a cylinder with radius r and height h.
vampirchik [111]

Answer:

Only the second and third statements are correct:

Doubling <em>r</em> quadruples the volume.

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Step-by-step explanation:

The volume of a cylinder is given by:

\displaystyle V=\pi r^2h

We can go through each statement and examine its validity.

Statement 1)

If the radius is doubled, our new radius is now 2<em>r</em>. Hence, our volume is:

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So, compared to the old volume, the new volume is quadrupled the original volume.

Statement 1 is not correct.

Statement 2)

Using the previous reasonsing, Statement 2 is correct.

Statement 3)

If the height is doubled, our new height is now 2<em>h</em>. Hence, our volume is:

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So, compared to the old volume, the new volume has been doubled.

Statement 3 is correct.

Statement 4)

Statement 4 is not correct using the previous reasonsing.

Statement 5)

Doubling the radius results in 2<em>r</em> and doubling the height results in 2<em>h</em>. Hence, the new volume is:

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So, compared to the old volume, the new volume is increased by eight-fold.

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7 0
3 years ago
In the Central City Grand Prix, out of 30 cars that started the race, 12 of them finished. What percent of the cars finished the
snow_lady [41]
To get the answer we can use proportion.
30----------100%
12-----------x
Cross multiply now
30x=12*100%
30x=1200% /:30 (divide both sides by 30)
x=40% - it's the percentage of cars which finished the race.
100%-40%=60% - it's the answer
3 0
3 years ago
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