The length of a rectangle is 2 inches more than three times the width. Find the length and width if the area is 85in^2

Use set buikder notation to represent the following set: {, -2, -1, 0}

If the discriminant if a quadratic equation is 4 which statement describes the roots?

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?