You fly in a helicopter for 20 minutes that goes at a speed of two 40 km/h how far did you go

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

Acoin bank containing only dimes and quarters has 12 more dimes than quarters. the total value of the coins is $11. how many quarters and dimes are in the coin bank?

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