Orlando bought a new couch for $2,904, using the furniture store's finance plan. he will pay $121 a month for 24 months. which equation can orlando use to find out how much money he still owes after each month of the plan? a. y= 2,904 + 121xb. y= 2,904 - 121xc. y= 121x - 2,904d. y= 121x

Plz which expression is equivalent to the expression below?

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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) = .