A pack of 10 pencils cost $4.50, 24 pencils costs $10.00 and a pack of 50 pencils costs $22.00. What is the most economical way to purchase pencils?

hi im bob : l

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answer: two angles are called supplementary if they add up to 180°. example: the two angles (140° and 40°) are supplementary because they add up to 180°.

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i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.