Catya's age is half the sum of her brothers age and 6 if catya is 9 years old how old is here brother

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Pls the last one and it has to be like number 6

A50-foot ladder is leaning against a vertical wall. if the base of the ladder is 45 feet from the base of the wall, find the angle the bottling of the ladder makes with the ground.