<span>going downstream -
t = 14/(2 + v)
going upstream -
t = 7/(2 - v)
14/(2 + v) = 7/(2 - v)
(2 + v)/2 = 2 - v
v = 2/3km/h</span><span>
</span>
Answer:

Step-by-step explanation:
<u><em>The question is</em></u>
Which equation should she use?
we have the formula

Solve for k
That means ----> isolate the variable k
Multiply by 2 both sides

Divide by x^2 both sides

Rewrite

Answer:

Step-by-step explanation:
Since 1pt = 2qt, 2.75pt = 5.5qt
The metric table goes like so: millimeters, centimeters, decimeters, meters, dekameters, hectometers, kilometers. To move down the table, move the decimal one to the right. Hectometers: 8.1,6.5. Dekameters: 81,65. Meters: 810,650. Hope this helps!