A
B or D is your answer
Hope this helps
Step-by-step explanation:
If all the marbles are identical then order does not matter so you use combination.
nCr so 10C4 = n! / (n-r)!(r!)
Solution
Step 1
Expand the brackets
8(9r-1) - 9(-8r + 2)
72r - 8 +72r -18
Step 2
Bring like terms together
72r + 72r -8 -18
Step 3
Sum and get the expression in its simplest for after factorization
144r -26
After factorization we will have in its simplest form the following answer
2 (72r -13)
Before the haircut her hai was 45 cm
she cut off 13 cm
45-13 = 32
after the haircut her hair is 32cm long
Answer:
3.5 grams
Step-by-step explanation:
8/8=1, 28/8=3.5
3.5 grams per serving
