PLEASE HELP A certain brand of tea bags comes in packages of 5, 10, and 20 sachets, costing
$5, $9, and $15 per package, respectively.
A store sold 16 packages containing a total of 165 sachets and took in $140.
(a) Write a system of equations to match the description of the information given.

Statement: if two points are given, then exactly one line can be drawn through those two points. which geometry term does the statement represent? defined term postulate theorem undefined term

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .

When is g(x) = 0 for the function g(x) = 5.23x + 4?