Agrocery store sells a 6 pack of bottled water for $3.79 and a 9 pack for $4.50 and a 12 pack for $6.89.which package costs the least per bottle ? explain your reasoning

The package cost the least per bottle is the 9-pack for $4.50

because the 6 pack for $3.79 cost $0.63 each bottle.

sol'n. 3.79÷6=0.63

while 9 pack for $4.50 cost only $0.50 each bottle.

sol'n. 4.50÷9=0.50 or .5

and the last one is the 12 pack for $6.89 cost $0.57 each bottle.

sol'n. 6.89÷12=0.57

your answer would be 10x - 1

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