In your notebook, set up the following subtraction in a vertical format and select the correct answer.

find 2p 2 + 3p - 4 less - 2p 2 - 3p + 4.

4p2 + 6p + 8
4p2 - 6p - 8
4p2 + 6p - 8
0

Step-by-step explanation:

Remember these rules for addition, substraction, multiplication or division:

Addition

++= +

--= -

Big + number-=  +

Big -number+=  -

Substraction

change the sign!

And follow the rules for addition

Multiplication or division

++= +

--= +

+-= -

Now for the exercise

- ()

Change the signal

()

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.