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>
 
        
        
        
Answer: d = 1/3
Step-by-step explanation: 48y = 48/4 = 12. So, 2d(18) is equal to 12. 12/18 is 2/3 so 2d has to equal 2/3. That means d = 1/3.
 
        
             
        
        
        
Answer:
D. 11.25 students per year
Step-by-step explanation:
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Given:
The two points on the line are  and
 and  .
.
The slope of the line joining two points  and
 and  is given as:
 is given as:

Here, 
∴ 
Equation of line with a point  and slope
 and slope  is given as:
 is given as:

Plug in -2 for  , 3 for
, 3 for  and -7 for
 and -7 for  . This gives,
. This gives,

Therefore, the equation of the line in vertex form is  .
.