No solution / no x
D=b^2-4*a*c -> D=-4^2-4*1*21 -> D=-28 -> D<0, no solution
        
             
        
        
        
Answer:
slope equals 2
Step-by-step explanation:
graph points and calculate rise over run
 
        
                    
             
        
        
        
Answer:
<em>(a) 3 inches
</em>
<em>(b) Her scale model drawing WILL fit on the piece of paper 8.5 by 7 inches</em>
Step-by-step explanation:
<u>Scaling
</u>
We use scales to represent realities in reduced spaces. In the case of lengths or surfaces, the scale allows us to draw the shapes in normal sheets of paper.  
(a)
Kelly's rock garden has a length of 6 feet. She uses a 1 inch:2 feet scale. this means that the model length is
6 feet*1 inch/2 feet = 3 inches
(b)
The width of the model is 5 inches, keeping the same scale it means the real length is
5 inches * 2 feet / 1 inch = 10 feet
The model will have 3 inches by 5 inches, it perfectly fits on any regular piece of paper
 
        
             
        
        
        
Answer:
answer in pic above 
Step-by-step explanation:
did this over thrice before coming to the right answer lol 
i hope it helps you xxx
 
        
             
        
        
        
Answer:
The standard number is greater than one. Negative means it's going to be .xxx