Answer:
2 miles
Step-by-step explanation:
convert 3/4 into 6/8. With this you have a ratio of 6/8 miles to 3/8 hours. Meaning 2/8 mile is equal to 1/8 of an hour. With this you can find that Jacie can swim 2 miles in a hour
 
        
             
        
        
        
Answer:
See image below:) 
Step-by-step explanation:
 
        
                    
             
        
        
        
First, add 2 to both sides. You should have 3/2x=21. Multiply both sides by 2 which gives you 3x= 42. Divide by 3 and you have x=14
        
             
        
        
        
8th grade = 3x = 3(47) = 141 band members.
7th + 8th = 188 
7th = x
8th = 3x
x + 3x = 188    ; x = 47 ;  47 + 3(47) = 47 + 141 = 188
4x = 188
4x / 4 = 188 / 4
x = 47 --> 7th grade
8th grade = 3x = 3(47) = 141
To check:
x + 3x = 188    ; x = 47 ; 
47 + 3(47) = 188
47 + 141 = 188
188 = 188