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AleksandrR [38]
3 years ago
6

The school café charges $3 for hot lunch. This amount is automatically withdrawn from a student's lunch account each day they pu

rchase. If Kelsey purchased hot lunch all 5 days last week, how much did her lunch account change? ​
Mathematics
1 answer:
Alexandra [31]3 years ago
7 0

Answer:

15 dollars

Step-by-step explanation:

you do 3 × 5 which will give you 15

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3 years ago
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Stels [109]

Every hexagon clearly has 6 sides. Nevertheless, every time you "glue" two hexagons together, you "lose" 2 sides to your count, because the sides where the two hexagons meet are not exterior sides anymore, and so they are not taken into account in our counting.

Also observe that with n hexagons you have n-1 points of contact between hexagons.

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You can check that these values are correct by counting the sides on the figure you have.

Finally, we can count the sides of a train with 10 hexagons by plugging n=10 in our formula:

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