Answer:
Explanation:
Given
cost of 2.5 pounds of cheese is $5.60.
To get the cost of one pound, we will use the equality postulate:
2.5 pounds = $5.60
1 pound = $x
cross multiply;
2.5x = 5.60
x = 5.60/2.5
x = $2.24
Hence one pound of cheese will cost $2.24
b) If Mrs. Peterson bought 4.75 pounds of cheese, to get the amount she paid, we will say:
1 pound = $2.24
4.75pounds = y
cross multiply
1*y = 2.24 * 4.75
y = $10.64
Hence the cost of 4.75pounds is $10.64
c) To find the cost of 5 pounds, we can use the fact that 2.5 pounds of cheese cost $5.60;
hence 2.5 pounds = $5.60
5 pounds z
cross multiply
2.5z = 5*5.60
z = 5*5.60/2.5
z = 2*5.60
z = $11.2
Hence the cost of 5 pounds of cheese is $11.2