Answer:
8
Step-by-step explanation:
1. multiply 5 and 12 to get 60
2. multiply 5 and m to get 5m
3. the equation would be 60 + 5m = 100
4. next, subtract 60 on both sides 
5. your equation so far is 5m = 40 
6. then divide 5 on both sides 
7. then you have your answer m = 8
 
        
             
        
        
        
Answer:
32 
Step-by-step explanation:
area of a triangle is bxhx1/2 
8x8 is 64
and then divide by 2
64/2=32
 
        
             
        
        
        
Answer:
first blank is "rhombus"
second blank is "rectangle"
third blank is "are congruent"
Step-by-step explanation:
 
        
             
        
        
        
I think c I might be wrong tho :)
        
                    
             
        
        
        
In the given you wrote -2, whereas it should be -2i
z = a + bi and in trigo form | z |.(cos Ф + i.sin Ф). 
z = 0 -2i → | z |.(cos Ф + i.sin Ф)
Now let's calculate z:
  
z² = a²+b² → z² = 0² (-2.i)² → z = -2(i)² →z= -2(-1) → z = |2|
tan Ф = b/a = -2/0 → tan Ф → - ∞ ↔ Ф = -90° or Ф = 270°
 then the - 2 I ↔ |2|(cos 270° + i.sin 270°)