Answer:
4:25
Step-by-step explanation:
13:40
- 17:15
_____
4:25
Answer:
it's D
Step-by-step explanation:
You use distribute property, then add all like terms
Answer:
d=-4 and a=10
Step-by-step explanation:
The sum of a arithmetic sequence is given by (n/2)*(2a+(n-1)d). Comparing coefficients with the given Sn, we have; a-d/2=12 and d/2=-2, d=-4 and a=10.