I must assume that you meant   <span>X^2-10x =7.  If that is indeed the case, then:
</span>X^2-10x =7  =>  x^2 -10x + 25 - 25 = 7, so that (x-5)^2 = 32  (Add 25, then 
                                                                                                 subtract 25)
Then x-5 = plus or minus sqrt(16)sqrt(2) = 4sqrt(2).
Then x = 5 plus or minus 4 sqrt(2) (answers)
        
             
        
        
        
Answer:
I believe it would be A. 1
Step-by-step explanation:
 ÷
 ÷  = 1
 = 1
hope this helps
 
        
             
        
        
        
The answer for the problem would be A. Y = 4x + 5
        
             
        
        
        
10.68 each for the 2 same length sides. The total of the 5 sides is 45.56 less the 3 sides which total 24.2 leaves 21.36 remaining for the 2 equal length sides. So divide 21.36 by 2 = 10.68
(45.56 - 24.2)/2 = 10.68