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steposvetlana [31]
3 years ago
7

The exterior angles of an octagon are 42°, 55°, 39°, 20°, 62°, 45°, and 47°. What is the measure of the eighth exterior angle? S

how equations and all work that leads to your answer.

Mathematics
1 answer:
VikaD [51]3 years ago
4 0

Answer:

the 8th exterior angle is 49 degrees

Step-by-step explanation:

The sum of the exterior angles of an octagon is 360 degrees

(this is true for all polygons)

42°+55°+ 39°+ 20°+ 62°+45°,+ 47+x = 360

combine like terms

311+x=360

subtract 311 from each side

311-311 +x = 360-311

x=49

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F(x)= x +4<br> g(x) = 3x<br> Work out the value of gf (5).
MrMuchimi

The value of gf(5) for the given two expressions is 135.

According to the question,

We have the following information:

f(x)= x +4

g(x) = 3x

Now, in order to find the value of gf(5), we will first find the value of gf.

Now, we will multiply these two expressions:

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Now, the terms outside the brackets need to multiplied inside the bracket:

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