(Please help :) Look at the sequence of numbers in each question and write the expression using n (find the nth term, eg, 3n+6)

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?