Find the value of x pls

Trevor and marissa together have 26 t-shirts to sell. if marissa has 6 fewer tshirts that trevor, find hiw many tshirts trevor has. identify the if-than moves in your solution

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.