Answer:
-14r + 6
Step-by-step explanation:
-12r + 6 - 2r
Answer:
The triangle is an isosceles triangle
You can write this ratio in two other ways:
7 to 13
7 : 13
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
