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Mathematics, 28.07.2019 05:00 cheerthi16
part a: larry earned $11 walking his neighbors' dogs on saturday. he earned some extra money on sunday doing the same thing. write an expression with a variable that shows the total amount of money larry has earned saturday and sunday. part b: larry was able to walk 4 more than twice as many dogs as his friend kyle. write an algebraic expression to represent the number of dogs larry walked compared with kyle. (6 points) asap! s. o.s
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Mathematics, 21.06.2019 19:50
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) = .
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part a: larry earned $11 walking his neighbors' dogs on saturday. he earned some extra money on s...
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