Not sure if i got these right can someone check my work

Mathematics

1 answer:

MA_775_DIABLO [31]3 years ago

7 0

Answer:

your answers are correct

Step-by-step explanation:

A straight angle measures 180°. It looks like a straight line with the vertex as a marked point on the line.

A right angle is usually marked with a little square in the corner, as in diagrams 2 and 5. Diagram 2 also shows complementary angles, two angles that have a sum of 90°.

Supplementary angles have a sum of 180°, so can form a straight angle as in diagram 1.

An obtuse angle is one that has a measure greater than 90°. (If it is greater than 180°, it is called a <em>reflex angle</em>.)

An acute angle is one that measures less than 90°.

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I really need help I’m very confused

Vaselesa [24]

Answer:

10: -11n^5

12: 6k^2 -6k+7

Step-by-step explanation:

Ok so what your gonna do is add or subtract the ones with the same exponent.

so -15+4= -11 since they are both n^5 you can add them so your answer is:

-11n^2

now you have 8k^2-k-5k+7-2k. so you are gonna rearrange them so the same exponents are together.(keep the sign in front in front, if no sign it is positive)

8k^2-2k^2-5k-k+7

add like exponents

6k^2-6k+7

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B hope this helps you on your test

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3 years ago

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Math question screen shot down below