7 because is it I do it and I know is correct
        
                    
             
        
        
        
Answer:
(12, -3)
Step-by-step explanation:
Add 4 to x value because it is a horizontal translation right 4. 
 
        
             
        
        
        
Answer:
80
Step-by-step explanation:
50 problems/x total = 62.5%
50/62.5=0.8 problem for each percent
0.8 * 100 percent = 80 problems
 
        
                    
             
        
        
        
Use slope formula y^2-y^1/x^2-x^1
So.
(-7-1)/(2-5) = -8/-3 = 8/3
        
             
        
        
        
Q = (-4, 6)
R = (8, 6)
You can work out the distance between the points by doing the following formula:
√(x₂ - x₁)² + (y₂ - y₁)²
Factor in our points:
√(8 - -4)² + (6 - 6)²
Solve the brackets (remember a negative and a negative make a positive):
√(12)² + (0)²
= √144 + 0 
= √144
Solve this expression to get your final answer of the distance between two points:
√144 = 12
I hope this helps. If it does then a Thanks or a Brainliest would mean a lot! :)