3 times a number is 54 less than the square of that number. find the negative solution

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?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

An electrician cuts a 136 foot long piece of cable. one piece is 16 feet less than 3 times the length of the other piece. find the length of each piece