IM GIVING 20 POINTS AWAY PLEASE HELP ME WITH QUESTIONS 2-4 AND EXPLAIN HOW YOU GOT YOUR ANSWER PLEASE!!!!!

Mathematics

1 answer:

lorasvet [3.4K]3 years ago

7 0

Answer:

2:(90) 4:B

Step-by-step explanation:

so what you do for 2 is that you times all the number thann you get youar ansmwer and for 4 you times 6 time 10 and thime 24 you get your answer

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A circle is described by the equation x2 y2 14x 2y 14 = 0. what are the coordinates for the center of the circle and the length

bearhunter [10]

Answer:

length is (-7,-1) and radius is 6

Step-by-step explanation:

We are given the expression of the equation of a circle that is

x2 + y2 + 14x + 2y + 14 = 0.

Using completing the squares:

x2 + y2 + 14x + 2y + 14 = 0(x+7)^2 + (y+1) ^2 = -14 + 49 + 1(x+7)^2 + (y+1) ^2 = 36 center thus is at (-7,-1) and the radius is equal to square root of 36 equal to 6.

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How do I solve 3(x+5)=39

azamat

3(x+5)=39

3 * x + 3 * 5 = 39

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3 years ago

Read 2 more answers

HELP PLEASE

scoundrel [369]

Isolating the x^2 is the simplest way. it would only be three steps.

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3 years ago

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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.

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

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2 years ago

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irinina [24]

149/1502≈0.1, which is C. Hope it help!

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4 years ago