2x -5x
3a + 10a
And -5
Combine and you get:
-3x + 13a - 5
Answer:
3.23
Step-by-step explanation:
6.26+6+3.41=15.67
15.67/7=3.23
I have mentioned time 7 sec from 3 to9
Answer: please mark brainlyest
Step-by-step explanation:
Answer:
A.
Step-by-step explanation:
I conclude that the sum will be even because any even number can be represented by 2n where n is a whole number
and even numbers are 2 apart, so
the sum of the first 15 are
2n+2(n+1)+2(n+2) etc until we get to 2(n+14)
we can undistribute the 2 from all of them and get
2(n+n+1+n+2...n+14)
and we are sure that whatever is in the parenthasees is a whole number because whole+whole=whole
therefor, the sum is even
if you did want to find the sum then
an=2n
the 15th even number is 30
the first is 2
S15=15(2+30)/2=15(32)/2=15(16)=240
which is even
