Step-by-step explanation:
x2^+8x=-20
9x^2=20
x^2=20-9
x^2=11
√x^2=√11
x=√11
 
        
             
        
        
        
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Answer:
(-3,4)
Step-by-step explanation:
I'm not sure of how to explain how it is but  basically the point it rotated and then it ends up on the coordinate, (-3,4)
 
        
                    
             
        
        
        
Not really sure whats up with that inequality but she can't, if she has to spend 1.5 hours in a lab that leaves her with 5 hours.  5/4 is 1.25, so no, she can only spend 1.25 hours with each student.
        
             
        
        
        
Width is 3.75. the length is 11.25. Hope this helps!