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2 years ago

please please please help I’ll give the brain thing if you give a correct answer + explain thanks!!!:))

Mathematics

1 answer:

Andreyy892 years ago

5 0

Answer:

I think its 4 because all the other ones are adding half of the original number

16-24 adds 8

8-12 adds 4

1-1.5 adds .5

so if it's going to 6 it should be 4 adding 2

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What is the value of n?

vitfil [10]

9(n+7) = 18(n+1)
9n + 63 = 18n + 18
9n = 45
n = 5

answer
n = 5

3 0

3 years ago

4/12 + 3/12 = ???????

iris [78.8K]

7/12

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3 years ago

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HELP PLEASE Find the measure of the missing angles.

user100 [1]

Step-by-step explanation:

value of d = 90° ( as it's a perpendicular)

e = 49° ( vertically opposite angle)

as, sum of all angles on a straight line is 180°

so,

48° + f = 180°

f = 180 - 49 = 131°

f = 131°

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2 years ago

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What is 43 percent of 84

Misha Larkins [42]

Answer:

36.12

Step-by-step explanation:

43% of 84 can be rewritten to 43% * 84 or 43/100 * 84.

43/100 * 84/1 = 3612/100

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2 years ago

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Statuary Hall is an elliptical room in the United States Capitol in Washington, D.C. The room is also called the Whispering Gall

dalvyx [7]

Answer: a) $\frac{x^{2} }{2352.25 }$ + $\frac{y^{2} }{529}$ = 1

b) The distance of two foci is 85.4 feet

c) Area = 3502.67 square feet

Step-by-step explanation: a) An ellipse has the equation in the form of:

$\frac{x^{2} }{a^{2} }$ + $\frac{y^{2} }{b^{2} }$ = 1, where a is the horizontal axis and b is the vertical axis.

For the Statuary Hall, a = $\frac{97}{2}$ = 48.5 and b = $\frac{46}{2}$ = 23, so the equation will be

$\frac{x^{2} }{2352.25 }$ + $\frac{y^{2} }{529}$ = 1.

b) To determine the distance of the foci, we have to calculate 2c, where c is the distance between one focus and the center of the ellipse. To find c, as a, b and c create a triangle with a as hypotenuse:

$a^{2}$ = $b^{2} + c^{2}$

$c^{2} = a^{2} - b^{2}$

c = $\sqrt{48.5^{2} - 23^{2} }$

c = 42.7

The distance is 2c, so 2·42.7 = 85.4 feet.

The two foci are 85.4 feet apart.

c)The area of an ellipse is given by:

A = a.b.π

A = 48.5 · 23 · 3.14

A = 3502.67 ft²

The area of the floor room is 3502.67ft².

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3 years ago