Solve for y
20x+5y=60
-20x -20x
5y=-20x+60

is it positive or negative 20?

Write the fraction or mixed number and the decimal shown by the model

Which number completes the inequality? 2/3 < _ < 7/9

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0