Answer:
x = 4
Step-by-step explanation:
a = i-2j
b = 2i-xj
1 = k•2
-2 = k•(-x)
=> 1/2 = k 
=> (-2)/(-x) = k
=> 1/2 = (-2)/(-x) => 1/2 = 2/x => x = 4
  
        
             
        
        
        
 ; 134
 a:8
 n:44
 3.6
 3.6
 P,ob.Z);Jlty : 1 - P(:
 <z<-
 [ - ]]p(-2.98 ' z ' 2.98)]
 [ -]p(z ' 2.98) - p(z ' -2.98)]
 [ - E0.9986 - 0.0014]
 =0.0028
 
        
             
        
        
        
The ratio of 7200 to 6400 equals 1.125 in decimal form. I hope this helps!:)
        
                    
             
        
        
        
Answer:
x =-1
Step-by-step explanation:

replace y by 2x +4 in the first equation
2(2x + 4) = 6x + 10 
4x + 8 = 6x + 10
-2x +8 = 10
-2x = 2
x = -1