Answer:
(☞゚ヮ゚)☞
Step-by-step explanation:
Sum of terms of a geometric series
Sn = a1 (r^n-1)/(r-1)
a1 = 1st term = 7
n = number of terms = 9
r = common ratio = -3
Sn = 7 ((-3)^8-1)/(-3-1) = -11480
Hence the sum is -11480.
It should be 4.2 & to solve you would do a^2+b^2=c^2
16p+6
Add 10p and 6p to get 16p
And add 15+-9 to get 6
(Adding a negative and positive number is like subtracting like in this example it is like saying 15-9)
Answer:
-2/45
Step-by-step explanation:
Firstly, we get it out of the brackets:
-3/5+5/9
than we multiply in order to get even divisor, which is actually greatest common factor (gcf):
(-3/5)×9+(5/9)×5
-27/45+25/45=-2/45