j + a = 50
j= a + 12
a+ 12 +a = 50
2a +12 = 50-12
2a = 38
a = 19
j =31
a = 19
Jordan is 31 years old and Anna is 19 years old. 
 
        
             
        
        
        
Answer:
18
Step-by-step explanation:
Here,
 given,
a=3 and b=6
Then 
 4a+b=?
Put respective values on 4a+b
4*3+6
=12+6
=18
 
        
                    
             
        
        
        
Answer:
90000
Step-by-step explanation:
To get the total area multiply 75 by 30 then to get the number of people multiply the product by 40. 75*30*40=90000
 
        
             
        
        
        
Answer:
Mild-Level 1: X=10
Medium-Level 2: X=21
Spicy Level 3: X=83
Step-by-step explanation:
You have to make sure each expression equals 90 degrees