1. Which of the expressions below has a sum of 0? Select all that apply. A) -18 + 81
B) -12 + 12
C) -6 + 6
D) 12 + (-21)
E) 3.3 + (-3.3)

step-by-step explanation:

. your answer will contain x - and y -terms. (1 point) x ( ¿¿ 2 − 7 ) 2 +( y 2 − 9 ) 2 √ ¿ 12. what is the distance from the directrix (the crocodile river) to the point ( x , y )? write this equation. your answer will contain a y -term.

answer

the correct answer is

explanation

the given function is

the excluded values are obtained by solving:

we factor to obtain:

the excluded values are

i think it would be c

mark brainliest if im right

step-by-step explanation:

the answer would be a 24

step-by-step explanation:

c=2πr=2·π·3=24