
If you solve it, the answer will be
C= 4.80
Seeing as its supposed to be a whole number, you will round up, so it will be 5
The explanation for this is one of my favorite pieces of mathematical reasoning. First, let's thing about distance; what's the shortest distance between two points? <em>A straight line</em>. If we just drew a straight line between A and B, though, we'd be missing a crucial element of the original problem: we also need to pass through a point on the line (the "river"). Here's where the mathemagic comes in.
If we take the point B and <em>reflect it over the line</em>, creating the point B' (see picture 1), we can draw a line straight from A to B' that passes through a point on the line. Notice the symmetry here; the distance from the intersection point to B' is<em> the same as its distance to B</em>. So, if we reflect that segment back up, we'll have a path to B, and because it came from of the line segment AB', we know that it's <em>the shortest possible distance that includes a point on the line</em>.
If we apply this same process to our picture, we see that the line segment AB' crosses the line
at the point (1, 1)
There are 9 with 2 legs and 7 with 4 legs
Hope this helps you !!
B^2 = a^2 + c^2 - 2ac sin B
is the answer
I think there are 7 nickels, because 7 dimes equals 70 cents, plus 7 × 3 = 21 , 21 × 5 = 105
70 + 105 = 175