Answer:
1) 7 burgers
2) 5/8 pounds
3) 5 pounds total
4) 20 burgers
Step-by-step explanation:
1) The key phrase is "at least" 3/8. That means we include not only the one burger that weighed 3/8 pounds, but all that weighed more as well! Add up all the burgers that were 3/8 or more pounds:
1 + 4 + 2 = 7
2) The heaviest burger weighed 3/4 pounds. The lightest burger weighed 1/8 pounds.
3/4 - 1/8 =
Find the least common denominator, which is 8. Multiply 3/4 by 2:
6/8 - 1/8 = 5/8
3) Add up all the burgers.
1/8 + 4(1/4) + 3/4 + 4(1/2) + 2(3/4) = 5 pounds.
4) We need to divide the total weight by 1/4 to get the number of burgers she could make.
5 / 1/4 is the same as 5 * 4/1 = which is 20 burgers.
She can make 20 burgers that weigh 1/4 pound each.
