A system of equations has infinitely many solutions. If 2y – 4x = 6 is one of the equations, which could be the other equation? y = 2x + 6
y = 4x + 6
–y = –2x – 3
–y = –4x + 6

Why do interests rates on loans to be lower in a weak economy than in a strong one

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) = .

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.