6. I think it's b but I could be wrong hope I helped.
In the first series, the summation applies to the whole (2n+3) inside
the parentheses, so the 3 gets summed up 5 times.
But in the second one, the summation only applies to the 2n , so
the 3 is only added after the summation is finished.
The difference between five 3s the first time and one 3 the second time
is your 12 .
Answer:
43.25-7-(t*1.15)
Step-by-step explanation:
because oBaMa
Answer and Step-by-step explanation:

Decreased by 20%