The ancient Greeks were very interested in number patterns. Triangular numbers are number that can be represented by a triangular array of dots, with n dots on each side. The first three triangular numbers are 1, 3, and 6.
Find the next five triangular numbers.

pls help quickly!!

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -

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)) =

Use δjkl and δmpn to determine whether don's claim is true or false. which of the following should don use to prove the triangles are similar? sss sas aas aa