Mathematics, 28.01.2020 13:57 erika6072

Solve each system of equations by using either substitution or elimination. r + 4s = -8 3r + 2s = 6

Answers: 1

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 19:40, evarod

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

Answers: 3

continue

Mathematics, 21.06.2019 19:50, Roshaan8039

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) = .

Answers: 3

continue

Mathematics, 21.06.2019 23:20, tsedeneyaalemu2924

Write the equations in logarithmic form 10^3=1,000

Answers: 1

continue

Mathematics, 21.06.2019 23:30, kylee76

How do you find the distance of each number from the mean

Answers: 1

continue

You know the right answer?

Solve each system of equations by using either substitution or elimination. r + 4s = -8 3r + 2s = 6...