An investor bought a number of shares of stock for $1,600. after the price dropped by $10 per share, the investor sold all but 4 of her shares for $1,120. how many shares did she originally buy?

Wesley is making patio from stones of two sizes, 5 inches wide and 10 inches wide. he wants to begin and end his pattern. with a 10-inch so there will be one more of the 10-inch stones than of the 5-inch stone. his patio will be 130 inches wide how many 10-inch stones will wesley need for one row ?