Question

A teacher wises to schedule a quiz or exam during part of a two hour class. The equation L + E = 120 can be used to find the available lecture time"L" given that " E " minutes are planned for the quiz or exam. Determine the ordered pairs that satisfy the equation if the domain is {20,30,45,60}
A. {(20,100) (30,90) (45,75) (60,60)}
B. {(100,20) (90,30) (45,75) (60,60)}
C. {(20,30) (45,60)}
D. {(20,120) (30,120) ( 45,120) (60,120)}