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crimeas [40]
3 years ago
14

11. What's the perimeter of a regular heptagon if one side measures 3 inches?

Mathematics
1 answer:
NemiM [27]3 years ago
7 0
When a polygon is regular, that means that all of its sides are the same length and all of its angles are the same. A heptagon has seven sides and you know that all of them measure 3 inches. You can find the perimeter by adding all of the side measures together, so 3 + 3 + 3 + 3 + 3 + 3 + 3, or 3 x 7. So, the perimeter of the heptagon is 21 inches.
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$#4 find the value of x. Round answer to nearest tenth please
Sonja [21]

Answer:

12.9

Step-by-step explanation:

sin 59 = opposite/hypotenuse

opposite is x, the dimension facing the angle 59

hypotenuse is the longest side = 15

sin 59 = x/15

x = 15sin59 = 15 x 0.8572 =12.858 = 12.9 in the nearest tenth

3 0
3 years ago
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Sergeeva-Olga [200]
A different size but not does not change shape.
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3 years ago
The solution to the system equations
katovenus [111]

Let's solve this system of equations through substitution.

We have these two equations.

-7x-2y=14

6x+6y=18

Now let divide the second equation by 6.

6x+6y=18 ---->   x+y=3

Next, let us move y to the right side of the equation.

x+y=3 -------> x=3-y (x equals 3-y)

Because we found out that what x is in terms of y, we can input that in for every instance of x in this equation below.

-7x-2y=14 becomes -7(3-y)-2y=14 (Why? Because x equals 3-y!)

We have a one variable equation now and can solve for y.

-7(3-y)-2y=14

-21+7y-2y=14

5y=35

y=7

Plug in 7 for y in any equation to find x.

x+y=3

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answer: x=-4, y=7

3 0
3 years ago
5 grams = <br> centigrams
ycow [4]

Answer:

500

Step-by-step explanation:

a centigram is 100 so 5x100=500

5 0
3 years ago
Read 2 more answers
(3n2 – 5n + 6) + (–8n2 – 3n – 2) =
Troyanec [42]
Hello!

You add like terms

3n^{2} + - 8n^{2} =  -5n^{2}

-5n + -3n = -8n

6 + -2 = 4

Put all the answers together

-5n^{2} -8n+4

The answer is -5n^{2} -8n+4

Hope this helps!
6 0
3 years ago
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