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il63 [147K]
3 years ago
7

For a convex 18-gon what is the sum of the interior angles ?

Mathematics
1 answer:
Alina [70]3 years ago
4 0
The sum of the interior angles is 160 Degrees because you do (18-2)*180 which equals 2880 and then you do 2880/18= 160
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Point b is the midpoint of ac-. if ab= 4x+2 and ac=10x-6, find the length of ac
Natasha2012 [34]

let's bear in mind that B is the midpoint and thus it cuts a segment into two equal halves.

\bf \underset{\leftarrow \qquad \textit{\large 10x-6}\qquad \to }{\boxed{A}\stackrel{4x+2}{\rule[0.35em]{10em}{0.25pt}} B\stackrel{\underline{4x+2}}{\rule[0.35em]{10em}{0.25pt}\boxed{C}}} \\\\\\ AC=AB+BC\implies 10x-6=(4x+2)+(4x+2)\implies 10x-6=8x+4 \\\\\\ 2x-6=4\implies 2x=10\implies x=\cfrac{10}{2}\implies x= 5 \\\\[-0.35em] ~\dotfill\\\\ AC=(4x+2)+(4x+2)\implies AC=[4(5)+2]+[4(5)+2] \\\\\\ AC=22+22\implies AC=44

3 0
3 years ago
The cost of 5 story books is Rs 800. How many books can be bought for Rs 1,440?​
djyliett [7]

Answer:

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=160

how many. book can be bought on rs.1400

=1400/160

=8.75

Step-by-step explanation:

=

4 0
2 years ago
7. Tariq can play 18 holes of golf in 180 minutes. Calculate what is his average rate per hole?
Murljashka [212]
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How do you add with decimals step by step?
astra-53 [7]

Answer:

https://www.mathsisfun.com/adding-decimals.html

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5 0
2 years ago
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lawyer [7]

Answer:

A circle with circumference 18 had an arc with 120 central angle.

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Hope this helps!

:)

5 0
3 years ago
Read 2 more answers
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