Posts by Cheng

Total # Posts: 3

In a farm, the farmer counted 78 legs and 35 heads consisting of cows and hens. How many hens does he have?

A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. The mass of the ball is 0.38 kg. The ball approaches the cushion with a velocity of +2.10 m/s and rebounds with a velocity of -2.00 m/s. The ball remains in contact with the cushion for a ...

7th Grade Math
z > -60*6 z > -360

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