A department store buys 100 shirts at a cost of $1,600 and sells them at a selling price of $20 each. Find the percent markup

In which form is the following function written? y = - 2(x – 3)(x + 5)

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.

Angle a and angle b are both supplementary angles. what must be true about the angles?