Solve this system of equations. Just write the numbers in the blanks. y = 1/2 x - 4
y= -1/4 x + 2

X =
Y=

I'll give brainliest if you answer right : )

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

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) = .