Answer:
the words are not that clear
Answer: 4
Step-by-step explanation: 4 was the biggest denominator in that equation. so if we multiply by 4 on all the terms, all the denominators will go away. we will not have any more fractions!
Answer:
7
Step-by-step explanation:
7x7x7
Answer: the second one
Step-by-step explanation:
Answer: 105 sandwiches can be made from all the peanut butter.
Step-by-step explanation:
Given: Total jars of peanut butter = 21
Part of peanut butter required for each sandwich = 
Total number of sandwiches made = ( Total jars of peanut butter ) ÷ (Part of peanut butter required for each sandwich)

Hence, 105 sandwiches can be made from all the peanut butter.