Question 174930This question is from textbook
: 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}.
This question is from textbook
Answer by Mathtut(3670)   (Show Source):
You can put this solution on YOUR website! Let E be the Domain{20,30,45,60} then the range is L
:
L=120-e
:
20: L=120-20=100
30: L=120-30=90
45: L=120-45=75
60: L=120-60=60
:
ordered pairs (20,100),(30,90),(45,75),(60,60)
:
If L is the Domain these ordered pairs would be reversed!!
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