Subtracting -3 points is the same as adding ?
3 points.

Yes. A double negative is the same thing as a single positive.

Step-by-step explanation:

For example. 2 - (-3) is the same as 2 + 3. The solution to both is 5.

it depends on which equation

Step-by-step explanation:

like 3-3=0

or

-3( -3)=0

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer