Question

Nellie is buying bird seed to put in her bird feeders. She uses about 10 pounds of bird seed each week, but has room to store any extra that she purchases.The bird seed comes in 3 different sizes as given below: 3.5 pounds for $2.52 7.5 pounds for $5.40 11 pounds for $7.92 Nellie is trying to be a smart shopper and get the best deal on the bird seed. Which size bag of bird seed should Nellie buy?

Answer 1

All size bags have the same constant of proportionality, therefore, it doesn't matter which size bag she chooses

Answer 2

Answer:

Step-by-step explanation:

Nellie wants to buy bird seed to put in her bird feeders.

The bird seed comes in 3 different sizes :

Bag of 3.5 pounds for = $2.52

cost per pound = $\frac{2.52}{3.5}$  = $0.72

Bag of 7.5 pounds for = $5.40

cost per pound = $\frac{5.40}{7.5}$ = $0.72

Bag of 11 pounds for   = $7.92

cost per pound = $\frac{7.92}{11}$ = $0.72

Per pound cost of bird seeds is same so it does not matter which size of the bag Nellie purchase.

She may buy 3 bags of 3.5 pounds or 1 bags of 7.5 pounds with 1 bag of 3.5 pounds or 1 bag of 11 pounds for a week.