A warehouse store sells 4.5-ounce cans of tuna in packages of 3. A package of 3 cans costs $4.32. The store also sells 3.5-ounce cans of the same tuna in packages of 4. A package of 4 cans costs $3.92. The store sells 6.5-ounce cans in packages of 5 cans for $9.75. Which package is the best buy?

The 6.5-ounce cans offer the largest size at a fair cost and is the best to buy.

Step-by-step explanation:

Size of the 4.5-ounce cans of tuna in package = 4.5 × 3 = 13.5 ounce

Cost of the package= $4.32

Size of the 3.5-ounce cans = 3.5 × 4 = 14 ounce

Cost of the package= $3.92

Size of the 6.5-ounce cans = 6.5 × 5 = 32.5 ounce

Cost of the package= $9.75

The 6.5-ounce cans offer the largest size and is the best to buy.

answer

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explanation

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the excluded values are obtained by solving:

we factor to obtain:

the excluded values are