Daud can jog 4 miles in 75 minutes. What is David's jogging rate per hour?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

What is not true about kl and mn? what is mn? (show )

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.