Write an equation for the nth term of the arithmetic sequence -5, 0, 5, 10... Then find a50. Please help.

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

Find the actual dimensions of the box. the side length are in meters and integers. the surface area of the box is 104 m2 and volume of the box is 60 m3.

Solve the system of equations. y=3x-1 and y=-2x+9. show work