Simplify the following expression: NEED HELP QUICK PLZ :( 2x − 8y + 3x2 + 7y − 12x

A 3x2 − 14x − y
B 3x2 − 10x − y
C 3x2 − 10x − 15y
D 3x2 + 10x − y

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

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)) =

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution