Answer :
Answer:
3 1/2 pounds or 3.5 pounds
Step-by-step explanation:
Two ingredients are measured in pounds while one is measured in ounces. Recall that 1 pound = 16 ounces. Thus, 12 ounces of cocoanut comes out to
(12/16) pound. Next, we sum up 1 1/2 pounds of flour, 12/16 pound of cocoanut and 1 1/4 pounds of sugar, after rewriting these mixed numbers with the same denominator (4):
1 1/2 pounds stays 1 2/4 pounds;
12 ounces becomes 3/4 pound; and
1 1/4 pounds stays 1 1/4 pounds
Summing up the fractions results in 6/4 pounds, or 1 1/2 pounds; and summing up the integers results in 2 pounds.
The final sum is 1 1/2 pounds + 2 pounds, or 3 1/2 pounds.
Dwayne buys 3 1/2 pounds of ingredients.
Alternatively, we could convert all of these measurements to decimal fractions and then add up those fractions:
1.5 pounds + 0.75 pounds + 1.25 pounds = 3.5 pounds (same as before).