Select the term that best describes the statement: the lights are on and nobody is home.
a. conjunction
b. disjunction
c. negation
d. conditional

The definition of A. Conjunction is:
the action or an instance of two or more events or things occurring at the same point in time or space.

The two events are as follows 1. Lights are on 2. nobody is home. 
So I believe the answer is A. 

Hope this helps !

(a) 
-7A = 35
A = 35 ÷ (-7)
A = -5  ← the coordinate of point A

(b)
1/2 B +1 = 11
1/2 B = 11 - 1
1/2 B = 10
B = 10 ÷ 1/2
B = 20  ← the coordinate of point B

(с)
|АВ| = B - A = 20 - (-5) = 20 + 5 = 25