Answer:
y =-14
Step-by-step explanation:
Inverse variation is of the form
xy = k where k is a constant
(-7)(-8) = k
56 = k
The equation is 
xy = 56
Let x = -4
(-4)y = 56
y = 56/-4
y =-14
 
        
             
        
        
        
We know that speed * time = distance
Before we start we need to make sure the units for all three numbers are right
The time is 1/3 of a hour, 1/3*60 = 20 minutes
x * 20 = 22.5
 
x *2 * 10 = 22.5
2x = 2.25
 
x = 1.125
        
                    
             
        
        
        
<em>The value of b is 14 and the value of c is 65</em>
<h2>
Explanation:</h2>
The quadratic function is a function of the form:

Here we know that the leading coefficient  so we reduce our equation to:
 so we reduce our equation to:

The roots are those values at which 
So:


So we have:

Finding c from (1):

<h2>Learn more:</h2>
Complex conjugate: brainly.com/question/2137496
#LearnWithBrainly
 
        
             
        
        
        
Answer:
D
Step-by-step explanation:
28×14=392, which generally already gives you the answer. But the extra area is a trapezoid so we do 4+6=10×2(height)=20, but we have to divide by two since its a trapezoid giving us 10. So 10+392=402
 
        
             
        
        
        
Answer:
6 
Step-by-step explanation:
2 books in each box. 
There are three boxes
2 times 3 equals 6