A grocery store sells four different jars of peanut butter. Determine which is the best buy, based on the cost per unit. (A) 14 ounces for $1.51 (B) 30 ounces for $3.54 (C) 20 ounces for $1.88 (D) 38 ounces for $4.37 Which size jar is the best buy? ◻ ounces

Calculate Cost per Unit: Calculate the cost per unit for the 14-ounce jar. To find the cost per unit, divide the total cost by the number of ounces. For the 14-ounce jar, the calculation is $1.51 / 14 ounces.Perform Calculation: Perform the calculation for the 14-ounce jar. $1.51 / 14 ounces = $0.1079 per ounce (rounded to four decimal places).Compare Cost per Unit: Calculate the cost per unit for the 20-ounce jar. For the 20-ounce jar, the calculation is $1.88 / 20 ounces.Perform the calculation for the 20-ounce jar. $1.88 / 20 ounces = $0.094 per ounce (rounded to four decimal places).Calculate the cost per unit for the 30-ounce jar. For the 30-ounce jar, the calculation is $3.54 / 30 ounces.Perform the calculation for the 30-ounce jar. $3.54 / 30 ounces = $0.118 per ounce (rounded to four decimal places).Calculate the cost per unit for the 38-ounce jar. For the 38-ounce jar, the calculation is $4.37 / 38 ounces.Perform the calculation for the 38-ounce jar. $4.37 / 38 ounces = $0.115 per ounce (rounded to four decimal places).Compare the cost per unit for all jars to determine the best buy. The jar with the lowest cost per unit is the best buy. Comparing the cost per unit of each jar: 14 ounces: $0.1079 per ounce 20 ounces: $0.094 per ounce 30 ounces: $0.118 per ounce 38 ounces: $0.115 per ounce The 20-ounce jar has the lowest cost per unit.

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A grocery store sells four different jars of peanut butter. Determine which is the best buy, based on the cost per unit.
(A) 14 ounces for $1.51
(B) 30 ounces for $3.54
(C) 20 ounces for $1.88
(D) 38 ounces for $4.37
Which size jar is the best buy?
◻ ounces

A grocery store sells four different jars of peanut butter. Determine which is the best buy, based on the cost per unit. $\newline$ (A) $14$ ounces for $\$ 1.51$ $\newline$ (B) $30$ ounces for $\$ 3.54$ $\newline$ (C) $20$ ounces for $\$ 1.88$ $\newline$ (D) $38$ ounces for $\$ 4.37$ $\newline$ Which size jar is the best buy? $\newline$ $\square$ ounces

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Grade 7

Solve two-step equations: word problems

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Q. A grocery store sells four different jars of peanut butter. Determine which is the best buy, based on the cost per unit.

\newline

(A)

14

ounces for

\$ 1.51

\newline

(B)

30

ounces for

\$ 3.54

\newline

(C)

20

ounces for

\$ 1.88

\newline

(D)

38

ounces for

\$ 4.37

\newline

Which size jar is the best buy?

\newline

\square

ounces

Calculate Cost per Unit: Calculate the cost per unit for the $14$ -ounce jar. $\newline$ To find the cost per unit, divide the total cost by the number of ounces. $\newline$ For the $14$ -ounce jar, the calculation is $\$1.51 / 14$ ounces.
Perform Calculation: Perform the calculation for the $14$ -ounce jar. $\newline$ $\$1.51 / 14 \text{ ounces} = \$0.1079 \text{ per ounce}$ (rounded to four decimal places).
Compare Cost per Unit: Calculate the cost per unit for the $20$ -ounce jar. $\newline$ For the $20$ -ounce jar, the calculation is $\$1.88 / 20$ ounces.
Compare Cost per Unit: Calculate the cost per unit for the $20$ -ounce jar. $\newline$ For the $20$ -ounce jar, the calculation is $\$1.88 / 20$ ounces.Perform the calculation for the $20$ -ounce jar. $\newline$ $\$1.88 / 20$ ounces = $\$0.094$ per ounce (rounded to four decimal places).
Compare Cost per Unit: Calculate the cost per unit for the $20$ -ounce jar. $\newline$ For the $20$ -ounce jar, the calculation is $\$1.88 / 20$ ounces.Perform the calculation for the $20$ -ounce jar. $\newline$ $\$1.88 / 20$ ounces = $\$0.094$ per ounce (rounded to four decimal places).Calculate the cost per unit for the $30$ -ounce jar. $\newline$ For the $30$ -ounce jar, the calculation is $\$3.54 / 30$ ounces.
Compare Cost per Unit: Calculate the cost per unit for the $20$ -ounce jar. $\newline$ For the $20$ -ounce jar, the calculation is $\$1.88 / 20$ ounces.Perform the calculation for the $20$ -ounce jar. $\newline$ $\$1.88 / 20$ ounces = $\$0.094$ per ounce (rounded to four decimal places).Calculate the cost per unit for the $30$ -ounce jar. $\newline$ For the $30$ -ounce jar, the calculation is $\$3.54 / 30$ ounces.Perform the calculation for the $30$ -ounce jar. $\newline$ $\$3.54 / 30$ ounces = $\$0.118$ per ounce (rounded to four decimal places).
Compare Cost per Unit: Calculate the cost per unit for the $20$ -ounce jar. $\newline$ For the $20$ -ounce jar, the calculation is $\$1.88 / 20$ ounces.Perform the calculation for the $20$ -ounce jar. $\newline$ $\$1.88 / 20$ ounces = $\$0.094$ per ounce (rounded to four decimal places).Calculate the cost per unit for the $30$ -ounce jar. $\newline$ For the $30$ -ounce jar, the calculation is $\$3.54 / 30$ ounces.Perform the calculation for the $30$ -ounce jar. $\newline$ $\$3.54 / 30$ ounces = $\$0.118$ per ounce (rounded to four decimal places).Calculate the cost per unit for the $38$ -ounce jar. $\newline$ For the $38$ -ounce jar, the calculation is $\$4.37 / 38$ ounces.
Compare Cost per Unit: Calculate the cost per unit for the $20$ -ounce jar. $\newline$ For the $20$ -ounce jar, the calculation is $\$1.88 / 20$ ounces.Perform the calculation for the $20$ -ounce jar. $\newline$ $\$1.88 / 20$ ounces = $\$0.094$ per ounce (rounded to four decimal places).Calculate the cost per unit for the $30$ -ounce jar. $\newline$ For the $30$ -ounce jar, the calculation is $\$3.54 / 30$ ounces.Perform the calculation for the $30$ -ounce jar. $\newline$ $\$3.54 / 30$ ounces = $\$0.118$ per ounce (rounded to four decimal places).Calculate the cost per unit for the $38$ -ounce jar. $\newline$ For the $38$ -ounce jar, the calculation is $\$4.37 / 38$ ounces.Perform the calculation for the $38$ -ounce jar. $\newline$ $\$4.37 / 38$ ounces = $\$0.115$ per ounce (rounded to four decimal places).
Compare Cost per Unit: Calculate the cost per unit for the $20$ -ounce jar. $\newline$ For the $20$ -ounce jar, the calculation is $\$1.88 / 20$ ounces.Perform the calculation for the $20$ -ounce jar. $\newline$ $\$1.88 / 20$ ounces = $\$0.094$ per ounce (rounded to four decimal places).Calculate the cost per unit for the $30$ -ounce jar. $\newline$ For the $30$ -ounce jar, the calculation is $\$3.54 / 30$ ounces.Perform the calculation for the $30$ -ounce jar. $\newline$ $\$3.54 / 30$ ounces = $\$0.118$ per ounce (rounded to four decimal places).Calculate the cost per unit for the $38$ -ounce jar. $\newline$ For the $38$ -ounce jar, the calculation is $\$4.37 / 38$ ounces.Perform the calculation for the $38$ -ounce jar. $\newline$ $\$4.37 / 38$ ounces = $\$0.115$ per ounce (rounded to four decimal places).Compare the cost per unit for all jars to determine the best buy. $\newline$ The jar with the lowest cost per unit is the best buy. $\newline$ Comparing the cost per unit of each jar: $\newline$ $14$ ounces: $\$0.1079$ per ounce $\newline$ $20$ ounces: $\$0.094$ per ounce $\newline$ $30$ ounces: $\$0.118$ per ounce $\newline$ $38$ ounces: $\$0.115$ per ounce $\newline$ The $20$ -ounce jar has the lowest cost per unit.

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