Just the first question pls but if you want to do the second one that would be much appreciated thanks.

What are the first 4 terms in the multiplication pattern given by the formula 2×4n

Bring the fraction a/a-4 to a denominator of 16-a^2

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.