Cho ánh xạ tuyến tính f có ma trận biểu diễn là A =


1 −4 15
−1 −22 20
1 −25 22


theo cơ sở a1 = (8, −6, 7), a2 = (−16, 7, −13) và a3 = (9, −3, 7). Tìm ma
trận của f theo cơ sở
b1 = (1, −2, 1); b2 = (3, −1, 2); b3 = (2, 1, 2)

Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.