9514 1404 393
Answer:
26,244
Step-by-step explanation:
The sequence is geometric with a common ratio of -3. The general term is ...
an = (a1)r^(n-1)
The first term is 4, so we have ...
an = 4·(-3)^(n-1)
For n=9, we find the 9th term to be ...
a9 = 4·(-3)^(9-1) = 4·3^8
a9 = 26,244
_____
<em>Additional comment</em>
When -3 is raised to an even power, the sign of the product is positive, the same as 3 raised to that power.
Answer:
D
Step-by-step explanation:
-6(2)=-12
5^-12
can't have negative power
1/5^12
Answer:
x= 4, y= -1
Step-by-step explanation:
3x -5y= 17 -----(1)
y= x -5 -----(2)
Substitute (2) into (1):
3x -5(x -5)= 17
Expand:
3x -5x +25= 17
-2x= 17 -25
-2x= -8
x= -8 ÷(-2)
x= 4
Substitute x= 4 into (2):
y= 4 -5
y= -1