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finlchey3860
05.04.2021 •
Mathematics
Chrissy had 4 gallons in her tank when her tank when she arrived at the gas station she pumped gas into her car at a rate of 3 tenths gallon per second how many gallons of gas were in the tank after s seconds
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Ответ:
9
Step-by-step explanation:
Call the Total Amount of money he had X.
Amount he used to buy pens: 3/8X
Amount of money left after buying pens: X - 3/8X = 5/8X
Amount he used to buy notebooks: 2/5 * 5/8X = 1/4X
1/4X or 2/8X for 2 notebooks, so if he spent 3/8X for notebooks, he would get 3 notebooks.
As a notebook cost 3 times a pens, so for 3/8X money, he bought 9 pens.