Which of these situations does not have quantities that combine to make 0. A. Veronica receives $21 for babysitting. She then spends $21 on a new shirt.

B. In the morning, the temperature rises 30 degrees. In the evening, it falls by 30 degrees.

C. Danny reads for 20 minutes. He then plays cards for 20 minutes.

D. A rock climber goes 40 feet down into a valley. She then goes 40 feet up a cliff.

Aportion of a line bounded by two points is defined as

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a