Well 5/6 x 3/4 is 15/24 so you’d do 24 dots across in 15 rows
        
             
        
        
        
X represent the number of laps Marcy swam, 114x represent the number of times Toni swam.
20 + 0.80(114x) + 15 + 0.85x = 257
20 + 91.2x + 15 + 0.85x = 257
92.05x + 35 = 257
Required equation is 92.05x + 35 = 257
        
             
        
        
        
Zeros do not count as a sigfig so when you do something like this problem just include the numbers until you hit your significant figure limit and then substitute zeros where you can. 20000
        
             
        
        
        
Answer:
The last option.
Step-by-step explanation:
First answer = 6/8
Second answer= 5.5/8
Third answer= 6.5/8
Fourth answer= 4/8
Fourth answer is correct.