Answer:
a vertical line will have no slope, and "the slope is undefined" or "the line has no slope" means that the line is vertical.
Answer:
See below.
Step-by-step explanation:

First, factor the numerators and the denominators:

Now, make the two denominators equivalent. To do this, we can multiply the first term by (z+1) and multiply the second term by 2. This will give us:

Now, combine them since they have a common denominator:

This cannot be simplified further.
Answer:
$240
Step-by-step explanation:
In June she had $20
in August she had 12x20= 240
It would be 1/2 because that is the fraction of 50<span>%
</span>
1) 1/2
2) 7/8
3) 4
4) 19/8 = 2 3/8