Mathematics, 12.03.2021 21:40 stmy1969
8. Driving at an average rate of 50 miles per hour, John reached his destination in exactly
2 hours and 30 minutes. To drive the same route in exactly 2 hours, John would have to
average what rate of speed?
Answers: 1
Mathematics, 21.06.2019 16:30
Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form
Answers: 1
Mathematics, 21.06.2019 19:00
Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(β2, 8), b'(β5, 6), c'(β8, 8), d'(β4, 2).
Answers: 2
Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) β sinh2(x) = 1 and (b) 1 β tanh 2(x) = sech 2(x). solution (a) cosh2(x) β sinh2(x) = ex + eβx 2 2 β 2 = e2x + 2 + eβ2x 4 β = 4 = . (b) we start with the identity proved in part (a): cosh2(x) β sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 β sinh2(x) cosh2(x) = 1 or 1 β tanh 2(x) = .
Answers: 3
8. Driving at an average rate of 50 miles per hour, John reached his destination in exactly
2 hours...
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