The rectangle shown has a perimeter of 90 cm and the given area. Its length is 5 times more than 3 times its width. Write and solve a system of equations to find the dimensions of the rectangle. The area is 350 cm
plz quick

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

How to do this , and can some one explain

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)) =