Katie bought a sweater and 1 skirt that cost $20. The items she bought cost a total of $60. What was the cost of the sweater? ​

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)

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?