Answer:
1. C(9,4) : n=9, s=4
2. C(10,5) : r=5
3. C(5,5) : n=5
4. C(7,7) : n=6
5. C(18,17) : r=3
Step-by-step explanation:
The equation is 7=1x and answer x=7
6x-12
Combine 2x and 4x = 6x
Combine -17 and 5 = -12
Theres an app called slader. If you look up what your school book is it will give you all the answers
