2 years ago

What is the sum of 7 of the interior angles of a regular decagon?

Mathematics

1 answer:

Setler [38]2 years ago

5 0

Answer:1440 degrees

Step-by-step explanation:

The interior angles of a decagon is 1440 degrees. All sides are the same length (congruent) and all interior angles are the same size.

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How do I solve this? Please show work, thank you.

irina [24]

Answer:

a x sqrt(7) - 49sqrt(x)

Step-by-step explanation:

sqrt(7x) [ sqrt(x) - 7sqrt(7)]

Distribute

sqrt(7x) *sqrt(x) - sqrt(7x)*7sqrt(7)

We know that sqrt(a) sqrt(b)= sqrt(ab)

sqrt(7x^2) - 7sqrt(7^2 *x)

Now lets separate out the perfect squares

sqrt(7) *sqrt(x^2) - 7sqrt(7^2)*sqrt(x)

x sqrt(7) - 7*7sqrt(x)

x sqrt(7) - 49sqrt(x)

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2 years ago

Gina wants to go to the water park with her friends. They have a total of w dollars to buy 5 tickets. Each ticket costs 15 dolla

frez [133]

Answer:

5 * w = 15

w= 3

Hope this helps!

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2 years ago

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15. Identify the slope of the line below and state the equation of the line.

mamaluj [8]

Answer:

Slope: m = 0

Equation: y = 3

Step-by-step explanation:

The equation of a line has the following format:

$y = mx + b$

In which m is the slope.

We choose two points which the equation crosses.

I am going to choose (0,3) and (1,3)

(0,3)

When x = 0, y = 3. So

$y = mx + b$

$3 = 0m + b$

$b = 3$

(1,3)

When x = 1, y = 3. So

$y = mx + 3$

$3 = 1m + 3$

$m = 0$

Slope: m = 0

Equation: y = 3

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2 years ago

1. Latoya baked b cookies, her family ate 13 of them. Using b write an expression for the number of cookies that remained :)

fiasKO [112]

Answer:

b-13

Step-by-step explanation:

I'm pretty sure this is right? Unless I'm missing something, if I am I am terribly sorry.

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Which is the value of x

vodka [1.7K]

16.5 is what I got for x you add them up and equal them to 180 because its a straight line

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2 years ago

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