Solve the following system of equations: x + 3y = 1
-3x - 3y = -15

A. (-2, 1) B. (7, -2)
C. no solution D. many solutions

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)) =

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.