Mathematics, 24.02.2020 22:26, genyjoannerubiera

Help please! There are just three questions I need them done asap!

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Mathematics, 21.06.2019 13:50, pedroramirezr2

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

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Mathematics, 21.06.2019 16:50, lucyamine0

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

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Mathematics, 21.06.2019 17:20, kolbehoneyman

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers. a) one of the 400 passengers is selected uniformly at random. let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

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Mathematics, 21.06.2019 18:50, jen12abc82

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

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Help please! There are just three questions I need them done asap!
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