Which equation could be used to solve the systems of equations using substitution? y=-3 - X
y = 3x + 5
A.) 3x - x = -3 + 5
B.)-3 - X = 3x + 5
C.)-3 - y = 3y + 5
D.)y = 3x + 5 - (-3 - x)

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)) =

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How to find the exponential function y=ca^x, with points (1,2) and (2,1)