The answer would be B. because a unit rate is usually equal to one for the sake of conversion
        
                    
             
        
        
        
Answer:
discriminant: 241
2 real roots
Step-by-step explanation:
The discriminant is the part of the quadratic equation that is under the sqare root
x=(-b±√(b²-4ac))/2a
discriminant: b²-4ac
We also know that a quadratic equation is in the form ax²+bx+c = 0, so we can plug in the values we know from our equation to find the discriminant.
a=4
b=-17
c=3
(-17)^2-4(4)(3)
We also know that if the discriminant 
is positive we have 2 real roots
is 0 we have 1 real root aka a repeated real solution
is negative we have no real roots
 
        
             
        
        
        
Answer:
x=-11
Step-by-step explanation:
-9x-4-8+7x=10
-2x-12=10
    +12 +12
-2x=22
-2x/-2=22/-2
x=-11
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
3 times 60 = 180 minutes
10 * 60 = 600 minutes
600/20 = 30 * 3 = 90 hours
 
        
             
        
        
        
Answer:
If the 21 cm is circumference, the answer would be 35.09.
If the 21 cm is radius, the answer would be 1385.44.
If the 21 cm is diameter, the answer would be 346.36.