Aboat has a speed of 15 mph in calm water. it takes the boat 3 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? 3(15 – c) = 2(15 + c) 2(15 – c) = 3(15 + c) 15 – c = 15 + c 15 – 3c = 15 + 2c

Step-by-step explanation:

Given: A boat has a speed in calm water= 15 mph

Time takes the boat  to travel upstream = 3 hours

Time takes the boat  to travel downstream = 2 hours

Let the speed of current represented by c.

Now, upstream speed = 15-c

Downstream speed = 15+c

We know that

Thus, distance covered downstream =

Distance covered downstream =

If they travel the same distance upstream and downstream, then we have  following equation,

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.

b i think

step-by-step explanation:

not really sure