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 .
a: draw a rectangle an label one side 80 and the other 115
b: 1560 Yards
We'll it keeps on subtracting by 4 to get each number.
-2,-6,-10,-14,-18,-22,-26.
Negative 26 is your answer. Hope this helped!
It is 70% Because:
250/100 + 175/x
Proportions
