What is the equation in point−slope form of the line passing through (2, 2) and (4, 8)?

2 answers:

8 0

M = (8-2)/(4-2) = 6/2 = 3

equation <span>in point−slope form
</span>
y - 2 = 3(x - 2)
or
y - 8 = 3(x - 4)

hope it helps

prohojiy [21]2 years ago

3 0

Y-2=3(x-2)
y-2=3x-6
y=3x-4
hope this helps u out :D

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A sphere with a diameter of 5 feet long is being painted. how much more paint would be needed to paint a sphere that has four ti

MArishka [77]

well, if the diameter is 5, thus its radius must be half that, or 2.5, and therefore, the radius of the one four times as much will be (4)(2.5).

Let's simply get their difference, since that'd be how much more is needed from the smaller to larger sphere.

$~\hfill \stackrel{\textit{surface area of a sphere}}{SA=4\pi r^2}\qquad \qquad r=radius~\hfill \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{\large difference of their areas}}{\stackrel{\textit{radius of (4)(2.5)}}{4\pi (4)(2.5)^2}~~ - ~~\stackrel{\textit{radius of 2.5}}{4\pi (2.5)^2}}\implies 100\pi -25\pi \implies 75\pi ~~ \approx ~~235.62~ft^2$