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3 years ago

Find the sum of the interior angles of a regular 14-gon.

Mathematics

1 answer:

Ira Lisetskai [31]3 years ago

4 0

9514 1404 393

Answer:

2160°

Step-by-step explanation:

The sum of interior angles of a convex n-gon is ...

angle sum = 180(n -2)°

When n=14, the angle sum is ...

angle sum = 180(14 -2)° = 2160°

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Subtract fractions with different denominators

Tems11 [23]

Answer:

$\frac{10}{15}-\frac{2}{5}=\frac{4}{15}$

Step-by-step explanation:

We know that

A fraction consists of two integers—one on the top, and one on the bottom.
The top one is numerator, the bottom one is denominator, and
These two numbers are separated by a line.

Let us consider two different fractions with different denominators

$\frac{10}{15}$

$\frac{2}{5}$

Lets subtract the two fractions

$\frac{10}{15}-\frac{2}{5}\:\:\:\:$

$\mathrm{Cancel\:}\frac{10}{15}:\quad \frac{2}{3}$

$=\frac{2}{3}-\frac{2}{5}$

$\mathrm{Least\:Common\:Multiplier\:of\:}3,\:5:\quad 15$

$\mathrm{Adjust\:Fractions\:based\:on\:the\:LCM}$

$\mathrm{For}\:\frac{2}{3}:\:\mathrm{multiply\:the\:denominator\:and\:numerator\:by\:}\:5$

$\frac{2}{3}=\frac{2\cdot \:5}{3\cdot \:5}=\frac{10}{15}$

$\mathrm{For}\:\frac{2}{5}:\:\mathrm{multiply\:the\:denominator\:and\:numerator\:by\:}\:3$

$\frac{2}{5}=\frac{2\cdot \:3}{5\cdot \:3}=\frac{6}{15}$

$=\frac{10}{15}-\frac{6}{15}$

$\mathrm{Since\:the\:denominators\:are\:equal,\:combine\:the\:fractions}:\quad \frac{a}{c}\pm \frac{b}{c}=\frac{a\pm \:b}{c}$

$=\frac{10-6}{15}$

$\mathrm{Subtract\:the\:numbers:}\:10-6=4$

$=\frac{4}{15}$

Therefore,

$\frac{10}{15}-\frac{2}{5}=\frac{4}{15}$

5 0

3 years ago

Joanna is selling tickets for the school play $he ha$ already $old $35

Nonamiya [84]

Answer:

okay, so given we have that she has already sold $35 worth of tickets. We know that she has seven tickets left to sell, and each is worth $5. So, we would do 7×$5=$35

Next, we would add $35(from the previous money she has made) and $35 (the money she just made from the 7 tickets) and that would equal $70

equation: y=35+7(5)

Step-by-step explanation:

I hope this helps! ^^

☁️☁️☁️☁️☁️☁️☁️☁️☁️

4 0

3 years ago

-b+10a-5 in standard form

ludmilkaskok [199]

Answer:

10a-b-5

Step-by-step explanation:

-b+10a-5 in standard form

10a-b-5

hoped this helped :)

7 0

3 years ago

What is the Area of a triangle with the height of 0.7 cm and a base of 6cm

Mashcka [7]

Answer: Area = 2.1 $cm^{2}$

Step-by-step explanation:

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3 years ago

8.75 x 10 ^3 in standard form

Sveta_85 [38]

Answer:

8.75×10^3

Step-by-step explanation:

here is the answer

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3 years ago