Let's focus on the given equation. The C represents the cost, while the x must be the number of tacos, which is what we're solving for. Since we're given the boundary that C must be 300, then the solution would be:
300 = x² - 40x + 610
x² - 40x + 310 = 0
Apply the quadratic formula where a = 1, b = -40 and c = 310. The roots of x are:
x = 29.49≈30
x = 10.51≈11
<em>Thus, she needs to sell either 30 or 11 tacos.</em>
Unit rate because unit is referring to one so for example for every unit, there are 6 apples. The unit in the case would be a box
5y+4x
5(10) + 4(-5)
50 - 20
30
Answer:
x = -(4/3)
Step-by-step explanation:

A is the answer for this one