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3 years ago

7

I need help with finding interior/exterior angles. solve for “?”

2 answers:

Ivenika [448]3 years ago

8 0

Answer:

3. 160

4. 105

5. 95

6. 30

7. 86

8. 130

All triangles equal 180 so when you add the other 2 degrees in the triangle then subtract that by 180 then you get the third angle. The a straight line also equals 180 degrees so when you get the third angle subtract it by 180 then you get the answer to the "?"

That's how I was taught so, hope I got it all right! : )

Elan Coil [88]3 years ago

4 0

3 is 120 degrees
4 is 105 degrees
5 is 95 degrees
6 is 30 degrees
7 is 86 degrees
8 is 130 degrees

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3 0

3 years ago

iren2701 [21]

Answer:

B

D

A

Step-by-step explanation:

Given:

A. $2x^3-x^{2} -6x$

B. $2x^3+8x+4$

C. $3x^4+x^{2} +x-7$

D. $3x^4-3x^{2} +5x-7$

Now, let us evaluate the given expressions one by one.

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It is equation B.

So, $(4x^3-4+ 7x)-(2x^3-x-8)$ is equivalent to B.

$(-3x^2+x^4+x)+(2x^4-7+4x)\\\Rightarrow -3x^2+x^4+x+2x^4-7+4x\\\Rightarrow3x^4-3x^{2} +5x-7$

It is equation D.

So, $(-3x^2+x^4+x)+(2x^4-7+4x)$ is equivalent to D.

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It is equation A.

So, $(x^{2} -2x)(2x+3)$ is equivalent to A.

So, answer is:

B

D

A

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