Find an equation in standard form for the hyperbola with vertices at (0, ą2) and foci at (0, ą7). y squared over forty nine minus x squared over four = 1 y squared over forty five minus x squared over four = 1 y squared over four minus x squared over forty nine = 1 y squared over four minus x squared over forty five = 1

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)) =

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]