Answer:

Step-by-step explanation:
For this case in order to select the one admiral, captain and commander, all different. We are assuming that the order in the selection no matter, so we can begin selecting an admiral then a captain and then a commander.
So we have 10C1 ways to select one admiral since we want just one
Now we have remaining 9 people and we have 9C1 ways to select a captain since we want a captain different from the admiral selected first
Now we have remaining 8 people and we have 8C1 ways to select a commander since we want a commander different from the captain selected secondly.
The term nCx (combinatory) is defined as:

And by properties 
So then the number of possible way are:

If we select first the captain then the commander and finally the admiral we have tha same way of select 
For all the possible selection orders always we will see that we have 720 to select.
Answer:
y=3x+28
Step-by-step explanation:
so a line perpendicular to one with a slope of 1/3 would have a slope of 3/1 which is just 3
so your line would be y=3x+b
to find b you just plug in the coordinates of the point that you want it to pass through into x and y. Remember that points are written as (x,y)
10=3x-6+b
10=-18+b
28= b
the equation is y=3x+28
There should be 24 turtles
I think it’s C not sure tho
w is william, c is charmaine
w = c + 3
3c + 2w = 76
substitute c + 3 for w
3c +2(c + 3) =76
3c + 2c + 6 = 76, combine the c's and subtract 6 from both sides
5c = 70
c = 14
w = c + 3
so w = 14 + 3
w = 17