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kkurt [141]
3 years ago
6

Find the sum of (x + 5) and (2x + 3) HELP ME PLEASE

Mathematics
1 answer:
disa [49]3 years ago
6 0
You can open the brackets because it is addition
x+5+2x+3
after rearranging
x+2x+5+3
=3x+8
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one interior angle of a polygon is a right angle and each of the other interior angles is 126°. Calculate the number of sides of
Vikentia [17]

Answer:

There are 7 sides.

Step-by-step explanation:

Let's Use the formula that states that the sum of the angles of an n-sided polygon is given by.

S=(n−2)180

Since we are given that the two angles are right, the angles and each of the remaining angles is 144.

And Therefore, the sum is:

S=90

(n−2)144

(n−2)180

=90

+90

+(n−2)144

⇒(n−2)180

−(n−2)144

=180

⇒(n−2)(180

−144

)=180

⇒(n−2)(36

=180

⇒n−2=

36

180

​⇒n−2=5

⇒n=5+2=7

Hence, the polygon has 7 sides.

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2 years ago
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Step-by-step explanation:

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