Alright, so we'd use the combinations with repetition formula, so we choose from 4 schools to distribute to and distribute 8 blackboards. It's then
( 8+4-1)!/8!(4-1)!=11!/(3!*8!)=165
For at least one blackboard, we first distribute 1 to each school and then have 4 blackboards left, getting (4+4-1)!/4!(4-1)!=7!/(4!*3!)=35
1.which of the following is not true for adding mixed numbers?
A.the denominators of the fractions must be the same in order to add them.
B.you can add mixed numbers by changing them into improper fractions or by using a number line.
C.the sum of the mixed numbers written as an improper fraction is in simplest form.
D.the sum of the mixed numbers must be written in simplest form
The answer is C
Answer:
umm, my regards, how should I help lol
Answer:
here are the definitions of each..
Step-by-step explanation:
Commence: begin; start
Devise: plan or invent (a complex procedure, system, or mechanism) by careful thought.
Originated: create or initiate (something).
Discover:find (something or someone) unexpectedly or in the course of a search.
so it cant be A of D so it would have to be B of C but i think the best answer is C
