What is the slope of the line that is perpendicular to the line that passes through (-3, 6) and (6,8)? Type a numerical answer in the space provided. If necessary, use the / key for a fraction bar. Do not include spaces in your answer.

Of four points are collinear, they are also coplanar

Someone answer this asap rn for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

3x = 729 solve for x plz . it's urgent. will mark