Simplify –4(5x) plz (don't mind this)

Solve the triangle. a = 21°, c = 105°, c = 5

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

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.