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viva [34]
2 years ago
15

PLEASE HELP 7TH GRADE MATH!!!!

Mathematics
1 answer:
ollegr [7]2 years ago
7 0

Answer:

2/7

Step-by-step explanation:

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Nuetrik [128]

Answer:

Step-by-step explanation:

<h2>C A L C U L A T I O N S</h2>
4 0
3 years ago
Please help, i dont understand an ounce of this
nignag [31]

Let x be the length of each side of the nonagon. We then split up the nonagon into 9 congruent, isosceles triangles, each with base = x and height = 12. Then the area of each triangle is 1/2 • x • 12 = 6x, so the total area of the nonagon will be 9 • 6x = 54x.

To find x, we can use some facts from geometry and trigonometry.

• In any polygon, the sum of the measures of the exterior angles is 360°. So each of these exterior angles will measure 360°/9 = 40°.

• Exterior angles are supplementary to the interior angles. So each interior angle will measure 180° - 40° = 140°.

• Each of the 9 triangles are isosceles with base angles measuring half the interior angles of the nonagon, 140°/2 = 70°.

• Cut the triangle in half along the labeled inradius of the nonagon, which has length 12. In the resulting right triangle, we have

tan(70°) = 12 / (x/2)

and solving for x gives

tan(70°) = 24/x

x = 24/tan(70°)

x = 24 cot(70°) ≈ 8.7

Then the total area of the nonagon is

54x = 54 • 24 cot(70°) ≈ 471.7

4 0
1 year ago
64 decreased by twice vanessas height as an algebraic expression
Dima020 [189]

Let vanessa's height = v.

twice of vanessa's height = 2v

64 decreased by... = 64 -

64 - 2v is your algebraic expression

hope this helps

3 0
3 years ago
Add (4x+4)+(5b+3) simplify your Answer. Help
yarga [219]

Answer:

5+4+7

Step-by-step explanation:

I think

5 0
3 years ago
Read 2 more answers
Find the value of x. Round to the nearest tenth
masha68 [24]

Answer: x= 42.3

Step-by-step explanation:

Sqrt a^2 + b^2 - (2ab)(cos 100)

Sqrt 25^2 + 30^2 - (2)(25)(30)(cos 100)

42.3

5 0
3 years ago
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