How do i do this cause i hate math and idk

How many kilometers are equal to 5 miles? use 1 mile ≈ 1.61 kilometers. !

Rewrite the polynomial -9x5 + 36x4 + 189x3 in factored form.

Aboat has a speed of 9 mph in calm water. it takes the boat 4 hours to travel upstream but only 2 hours to travel the same distance downstream. which equation can be used to find c, the speed of the current? 2(9 – c) = 4(9 + c) 9 + c = 4(9 – c) 9 – c = 2(9 + c) 4(9 – c) = 2(9 + c)