Proof of Identities and equalities. Determine for what values of x and y is the following equality always true? Will give 100 points

x^2+y^2=(k-2)x-2ky-k-4=0,

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

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?