If A,B and C lie on the same line:
4x- 9 + 3x+5 = 17
7x = 21
x = 3
Slope:

Slope is rise over run. It is a ratio of the amount of the y-axis over the amount of x-axis. So, now assign the first group of numbers, (-2,-3) as 1; then the second group, (1,1) as 2. Like this:

Notice the subscripted numbers designate the group number. Next, plug in the numbers and do the math.

So, the slope, m, is equal to four thirds.
m = 4/3
An "equation" has a left side, a right side and an equals sign separating the sides. An "expression," by contrast, doesn't have any "sides" and is simply what the name suggests: An algebraic "expression<span>."</span>
The answer will be price per ounce.
This means price/ounce.
For example (not the answer):
A) $3.45 / 3.5oz = 0.99 dollars per oz
Answer:
the answer is C! Brainliest?