Answer:
<h2>             
 k = 3</h2>
Step-by-step explanation:
The vertex is (d, e) 
for quadratic function: f(x) = ax² + bx + c  we have: 
d = -b/a    and    d = (x₁ + x₂)/2  
a = 1,   b = k,   x₁ = -4,    x₂=-2      
so:
d = -b/a = -k/1 = -k   and   d = (x₁ + x₂)/2 = (-4-2)/2 = -3
-k = -3
k = 3
 
        
             
        
        
        
Answer:
4 donuts per minute/(donutes is that a typo?)
Step-by-step explanation:
if a bakery can make 60 donuts in 15 minutes, that is 60 donuts/15 minutes.
to reduce this fraction, the top and bottom can be divided by 15 to get 4 donuts/1 minute.
 
        
             
        
        
        
Answer:
9
Step-by-step explanation:
40 dollars due up front
10 dollars made per sale
5 dollars lost per creation
Realistically speaking she is only making a $5 profit per box she sells; 
<em>$5 used up for material cost, $10 made from sales </em><em>-5+10= 5</em>
To pay the $40 dollar for the booth she would need to make 9 sales with her current profit
<em>40/5 = 9</em>
 
        
             
        
        
        
Answer: pi/8
Step-by-step explanation:
adding or multiplying an irrational by a rational will result in another irrational. So we could take something like pi and divide it until it’s between 2/7 and 3/7. I did that and apparently pi/8 works, so boom