30)

31)
a simple case for that would just be, using an equation with an imaginary value, let's do so

when you get a "solution" or zero with an "i" or an imaginary value, is just a way to say, there's really no solution, the function never touches the x-axis
Y=7/6x+ (any number) will be a line parallel to the one above.. It has to contain the same slope 7/6
Y=7/6x+_
Answer:
0.5
Step-by-step explanation:
Multiply 8 3/4 lb by the conversion factor 16 oz
------------
1 lb
Then 35 lb 16 oz 560 oz
-------- * ----------- = ------------- = 140 oz (answer)
4 1 lb 4