Write a equation for the vertical and horizonal lines passing through the points (4,1) i know x=4 and y=1 but what eles do i do?

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

Describe the relationship between the angles of similar triangles and the sides of similar triangles

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11