Answer:
 v×w =  -6i-12
Step-by-step explanation:
hello : 
Let v=-3i and w=2 - 4i.
 v×w = -3i(2-4i) = -6i+12i² = -6i-12    ... i² = -1
 
        
             
        
        
        
Answer:
1261.68
Step-by-step explanation:
1350 = the increased watch price= 107% of the original
1350= 1.07x
1261.68224299 
Check: 
7% of 1261.68224299 is 88.317757
1261.68224299 + 88.317757 = 1349.9 = 1350
Round: 
1261.68224299  
To the penny= to the hundreth= 1261.68
 
        
             
        
        
        
Answer: x < -3 or x > 5
Step-by-step explanation: Interval notation shows the values of x. X is less than -3, or greater than 5.
 
        
             
        
        
        
Answer:
x = 9
Step-by-step explanation:
50+80+(6x-4)=180 (ANGLE SUM PROPERTY)
130 +(6x-4)=180
6x-4=180-130
6x-4=50
6x=50+4
x=54/6
x = 9