504300 in standard form

Which of the following lines is not parallel to the graph of y = 4x +7?

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%.

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.