What is the result of isolating y2 in the equation below? 9x2 + 7y2 = 42

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.

Rena is building a 1: 180 scale model of a real castle. her model has a rectangular base that is 3 feet wide and 4 feet long what is the area of the base of the actual castle in square feet

You are designing a rectangular pet pen for your new baby puppy. you have 30 feet of fencing you would like the fencing to be 6 1/3 feet longer than the width