What is the theoretical probability, as a percent, of flipping heads?

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?

Select the quadratic that has root x = 8 and x = -5

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)