<em>i</em><em> </em><em>think</em><em> </em><em>it</em><em> </em><em>is</em><em><u> </u></em><em><u>8</u></em>
Step-by-step explanation:
hope this helps! ;)
Speed = Distance / Time
Distance = Speed*Time
For this problem, we should bear in mind that current speed has an impact on the boat speed...
for upstream, the boat goes against the current, and so its speed is
U = V - C
where V is the speed of the boat
C is the current speed
for downstream, it will be:
D = V + C
Convert the problem into mathematical equations:
4D + 3U = 116
3D + 4U = 108
4(V+C) + 3(V-C) = 116
4V + 4C + 3V -3C =116
7V + C = 116
3(V+C) + 4(V-C) = 108
3V + 3C + 4V - 4C = 108
7V - C = 108
Solving the equations:
7V + C = 116
7V - C = 108
14V = 224
V = 16km/hr —-> speed of boat
to get C:
7(16) + C = 116
C = 4km/hr
Answer:
308.75 calories cuz 2470/83 is 308.75
Step-by-step explanation:
You would find the slope then use the Pythagorean theorem to solve for other side. When finding the slope, in this case the negatives don't matter because they will get squared and become positive anyways.
A to B: 5/7
B to C: 2/9
A to C: 2/3
A to B: 5/7 = square root 74 roughly 8.6
B to C: 2/9 = square root 86 roughly 9.2
A to C: 2/3 = square root 13 roughly 3.6
8.6+9.2+3.6=21.4
