So, to evaluate a combination, there's a formula we use.
I don't remember the formula from the top of my head, lol, but this is how you solve them.
7 c 2
When doing combinations and permutations each number is always in a factorial. We always start with the number on the left.
7! That's the total amount. The number on the left divides into that.
7! / 2!
We're not done yet. Here's the tricky part. We also always divide the number on the left, in this case 7!, with the positive difference of both numbers given to us.
7 - 2 = 5
So, we have 7! / 5! / 2! = 21.
Hope that helped!
Let's work another one.
5 c 3
We have 5! / 3! ,but we need to also divide 5! by the positive difference of 5 and 3. We get 2.
So, 5! / 3! / 2! = 10.
If you have any questions then leave a comment. Good luck!
3:5=x:50
Therefore 5 ×x = 50
x = 10
Therefore 3 × 10 = 30
therefore 30 blue pens
proof = 30 blue + 50 red= 3+ 5
therefore 80 = 8x
Answer:
a) 87.7
b) g(t) = f(t)/2.2
Step-by-step explanation:
The number of pounds is 2.2 times the number of kilograms, so we have ...
f(t) = 2.2·g(t)
a) On day 37, Chase's weight in kg is ...
f(37) = 2.2g(37)
193 = 2.2g(37)
g(37) = 193/2.2
g(37) ≈ 87.7
__
b) Rearranging the equation we started with, we have ...
g(t) = f(t)/2.2
The answer is " i " i just took the test.
Answer:
base: 30 cm
height: 15cm
Step-by-step explanation:
Let 'b' be the length of the side of the base, and 'h' the height of the box. The volume is given by:
The total area of material used is:
Using both equations to solve for 'b':
The value of 'b' for which the derivate of the area function (A) equals zero, is the value that yields the minimum area.
If b=30, the height 'h' is:
