Math!! Pls help

Which expression is equivalent to x^2 - 4x -45

Acompany is making new soccer uniforms for a team. the company uses 2.5 yards of fabric for each shirt. the company uses 82.5 yards of fabric to make shirts and shorts for 15 players. the equation and solution below represents the situation. 15(2.5+x)=82.5; x=3 what does the solution, x=3, represent?

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

Ateacher noticed 5/8 of the students were wearing either blue shorts or white shorts. write two different ways this could be done.