Is combining like terms a strategy?

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

What is the base of 1/9 to the power of 2

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b