Автомобиль приехал расстояние между двумя городами за 16 ч., при этом 2/7 всего пути он ехал со скоростью 30 км в час ,а остальную часть пути со скоростью 45 км в час. Определить расстояние между этими городами.

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.