What is the simplified expression for 3 a squared + 9 a b + 5 minus 4 a squared minus 4 a b + 3?

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?

Use the distributive law to multiply. 3(4x + 5y + 6)

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !