Convert each linear equation to standard form. y-4= -2(x+3)

The standard distance between studs in a house is 1.5 feet. if you have a set of blueprints for a house that mark every 1.5 feet with 2 in., by how many inches will a 13-foot wall be represented?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

How can constraints be used to model a real-world situation?