With these five questions?

i do not understand any of

What number line represents the solution set for the inequality -1/2 greater than or equal to 4

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.

What is the solution to the equation e3x=12? round your answer to the nearest hundredth