The product of the slopes of two non-vertical perpendicular lines is always - 1. it is not possible for two perpendicular lines
to both have a positive slope because the product of two positives is positive. so for the product of the slopes to be -1, one
of the slopes must be positive and the other negative
select the best answer from the choices provided
ot
o e

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

1

x = 1

step-by-step explanation:

0 ÷ x = 0

0 ÷ 1 = 0

is there more info provided? there is not enough information given in the problem