Which graph below shows a system of equations with infinitely many solutions?

a)coordinate plane with two parallel lines
b)coordinate plane with two intersecting lines
c)coordinate plane with two coinciding lines
d)coordinate plane with two intersecting lines

Julian wrote the following numeric pattern on the board3,10,17,24,31,38.what numbers of julian's pattern are compound numbers.

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

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) = .