Joey made 300 greeting cards. he sold 40% of the cards, gave 85% of the remaining cards to him friends, and kept the rest of the cards for himself. how many greeting did he keep for himself?

Asap will give brainliest and a lot of points

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons