Answer:
Similar triangles states the length of the  corresponding sides are in proportion.
In a given similar triangles:
Labelled the diagram:
Triangle BAC and triangle DAC are similar.
then;
Corresponding sides:
 
 
AB = x units , BC = 5 units, AD = 15 units and DC = BD-BC = 8-5 = 3 units

By cross multiply we get;

Simplify:

Divide both sides by 3 we get;

Simplify:
x = 25 units
Therefore, the value of x is 25 units.
 
        
             
        
        
        
The right answers are
1. C, 1
2. B, an+1 = an x 3, a1 =5
3. C, an = -6 x 0.5^n-1
4. D, an + 2/3 x (1/2)^n-1
5. D, an+1 = an x (-2), a1 = 5
I just took the test and got 100% so these should be correct
 
        
             
        
        
        
Answer:
Option B is correct 
Step-by-step explanation:
Option B is correct 
 
        
                    
             
        
        
        
Answer:
-22
Step-by-step explanation:
Due to order of operations rules, we must perform the subtraction inside parentheses first, getting:
-4 +(3)(-6)
 Multiplication comes next:  
-4 - 18
and the total value is thus -22.
 
        
             
        
        
        
I don’t know because you don’t show any chart