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Mathematics, 02.12.2019 00:31 lcyaire

1.) there are 8 people in a room.
each person shakes hands with each of the other people once and only once.
how many handshakes take place?

2.) a student has some pigs and some chickens.
he finds that together they have 70 heads and 200 legs.
how many pigs and how many chickens does he have?

3.) a well is 10 feet deep.
a frog climbs up 5 feet during the day, but falls back 4 feet at night.
assuming that the frog starts at the bottom of the well,
how many days does it take the frog to get to the top?

i'm looking for work shown, too, ! : )

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1.) there are 8 people in a room.
each person shakes hands with each of the other people once...
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