Step-by-step explanation:
y=3x-5
6x+3y=15
6x+3(3x-5)=15
6x+9x-15=15
15x-15=15
+15 +15
15x=30
/15. /15
x=2
6(2)+3y=15
12+3y=15
-12. -12
3y=3
/3 /3
y=1
(2,1)
The answer is (2,1)
Answer:
-1/175
Step-by-step explanation:
The formula is
Sn = a1. 1 - r^n
--------- where r = common ratio and a1 = first term
1 - r
Here we have r = -6 and a1 = -1, and n = 6. So:-
Sum of 6 terms S6 = -1 * 1 - (-6)^6
------------- = 6665
1 - (-6)