1. Two cars, Party A and Party B, drive in opposite directions from AB at the same time, and meet at a distance of 80 km. After meeting, the two cars move on. As soon as A arrived at B, B immediately retraced his steps and met again 60 kilometers away from B.. Find the distance between AB and B.
2. Xiaogang reads 15 pages of extracurricular books every day, and at the end of the day (
) page.
In the past, there were 35 people on a bus. I got on X people and Y people at Xinjie Station. Now there is (
) people.
4. In a triangle, angle 3 is 5 times of angle 1 and angle 2 is 3 times of angle 1. What triangle is this?
Dad is three times as old as his son. Dad is 26 years older than his son. How old is the father and the son?
The two sides of an isosceles triangle are 3 cm and 6 cm respectively, so the third side is long (
) centimeters. (Write formula)
A 3
B 6
C 9