Parallel lines have equal/same slopes
Domain is the complete list of x-values that a function can have, and the range is the complete list of y-values that a function can have.
Domain and range can be written as (x, y) if the domain/range does not include the x or y value.
Domain/range can be written as [x, y] if the domain/range does include the x or y value.
If the function has multiple intervals, we use U to symbolize "union."
Got a calculator? all you do for #1 and #2 is multiply the two numbers and that is the value for x.
These problems are cross multiplication.
For the next two:
.25x = 6
divide both sides by .25
x = 24
NEXT ONE:
.49x = 12
divide both sides by .49
x = 24.48
