Which statement explains how you could use coordinate geometry to prove that quadrilateral ABCD is a square? A. Prove that all sides are congruent, and the slopes of consecutive sides are opposite reciprocals

B. Prove that segments AD and AB are congruent and parallel

C. Prove that opposite sides are congruent and that the slopes of consecutive sides are equal

D. Prove that segments BC and CD are congruent and parallel

Aquadratic function f(x) has a turning point at (3,-7). what is the turning point of -f(x)?

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)

Someone answer asap 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)) =