Answer:
-4/5
Step-by-step explanation:
Answer:
see explanation
Step-by-step explanation:
The common difference d of an arithmetic sequence is
d =
-
=
- 
Substitute in values and solve for k, that is
5k - 1 - 2k = 6k + 2 - (5k - 1)
3k - 1 = 6k + 2 - 5k + 1
3k - 1 = k + 3 ( subtract k from both sides )
2k - 1 = 3 ( add 1 to both sides )
2k = 4 ⇒ k = 2
--------------------------------------------------------
The n th term of an arithmetic sequence is
=
+ (n - 1)d
= 2k = 2 × 2 = 4 and
d = 5k - 1 - 2k = 3k - 1 = (3 × 2) - 1 = 5
Hence
= 4 + (7 × 5) = 4 + 35 = 39
The answer is c because when you do 5 anything on n you get y
Answer: X^2-x-1=y
Step-by-step explanation:
Multiply every number inside the parentheses
(X+3)(x-4)
X^2-4x+3x-1
Add all similar numbers and we get
X^2-X-1
You want to isolate the variable 'y'.

Subtract 10 to both sides:

Divide -3 to both sides: