Iwould give more pints but i dont have any. who ever answers first get brainliest. which set of expressions are not equivalent? 4x(x) + 3(2x) and 4x2 + 6x 5(3x) - 4(3x) and 3x 4(3a) - 2(4a) and 4a2 3(3a) + a(3a) and 3a2 + 9a

Write the equation below the represents the line passing through the point (-3, -1) negative one with a slope of 4

Which equation represents the partial sum of the geometric series?

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) = .