Expert: Sherman D. - 3/1/2005

Question
8).A teacher wishes to schedule a quiz or exam during part of a two hour class.The equation 1 + e=120 can be used to find the available lecture time "1" given that "e" min are planned for the quiz or exam.Determine the ordered pairs that satisfy the equation if the domain is 20,30,45,60
11).x2 - 4=y
19).is 1 - y=2x a direct variation

Answer
8.)
if you have
1 + e = 120
then e = 119
so unless you meant something else, i don't get what you are saying. Also for you to have ordered pairs, you need to have 2 variables not one.

11.) x^2 - 4 = y
for a graph, go to www.calculator.com, click on Graphing.
you should get that x = -2 and +2

19.)
1 - y = 2x
-y = 2x - 1
y = -2x + 1
for a graph, same thing above.