A store sells jump rope cost the same amount . During a sale the store reduces the price of each jump by $1.90. Marc spends $12.78 on 2 jump ropes at the sale price . What was the price of 1 jump rope before the sale ? Enter the answer in the comments

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) = .

Which point-slope form equation represents a line that passes through (3,-2) with a slope of -4/5

What is the 8th term of the geometric sequence with this explicit formula? an= )(n-1)