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3 years ago

12

Simplify (3a4 – 2a2 + 5a – 10) – (2a4 + 4a2 + 5a – 2). A. a4 + 4a2 + 10a – 12 B. 5a4 + 4a3 + 3a2 + 10a – 12 C. a4 – 6a2 – 8 D. a

4 + 2a2 + 10a – 12

1 answer:

kirill115 [55]3 years ago

6 0

A^4-6a^2-8 is the write answer
option c
just open the brackets and then add and subtract
according to PEMDAS rule or DMAS

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meriva

Answer:

900°

Step-by-step explanation:

The sum of interior angles of a polygon with $n$ sides is given by:

Sum = $(n-2)*180$

Here, <u>the polygon has 7 sides</u>, so $n=7$ . Plugging this into the formula gives us:

Sum = $(7-2)*180\\=5*180\\=900$

So the answer is the first choice, 900°.

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