2x +3y = 6 i need to know how to solve its y intersept or something intersept

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.