Ms. Yardley wrote four sets of ordered pairs on the whiteboard for her math students. For which set is y a function of r?
0 (-3, -2), (3, - 2), (-2, 1), (2, 1), (0, 0)

(4, - 2), (4, 2), (2, – 4), (2, 4), (4, 4)

(-1, 2), (4, 3), (-1, 5), (-6, - 2), (-2, 1)

(0, 2), (4, 5), (-3, – 3), (0, - 1), (6, - 2)

I’m stuck on this i don’t understand.

Can (2,3 and square root 10) be sides ona right triangle?

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)) =