Answer: 4a
Explanation If ‘a’ represents his age today, and you have to find his age in four years you take 4 multiplied a. (4 x a) putting it together and you would get 4a
        
             
        
        
        
Answer:charlidamelio sucks at sing ✨robbery by juice wrld ✨ just saying and two exactly 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
regular price = $15
Step-by-step explanation:
Represent the regular price by d.  Then the discount was 0.20d, and the sale price was (1 - 0.20)d, or 0.80d, which is $12.
Solving for d, we divide both sides by 0.80:
d = regular price = $15