Answer:
The groups walking speed is
or 
Step-by-step explanation:
we know that
To find the speed divide the distance by the time
so

Convert to mixed number

The sides would each be 8 inches
Answer:
x= 8
Step-by-step explanation:
17x + 3 = 139
17x = 136
x = 8
Answer:
427.39
Step-by-step explanation:
First find out what is 7.25% of 398.50
398.50 * .0725 = 28.89
Add the 7.25% of 398.50 to 398.50
398.50 + 28.89 = 427.39