Bill travels the 400 miles from san francisco to los angeles at 50 mph. sam travels the same distance at 40 mph. how many more hours than bill did it take sam to travel the 400 miles?

Acircle has a circumference of 7.850 units. what is its radius?

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.

For the inequality |c| < |d| to be true, which of the following must be true?