Since you're only interested in x, you can use the first equation to write an expression for y that can be substituted into the second equation.
.. y = k -x
.. 2x +3(k -x) = k +1
.. -x +3k = k +1 . . . . . collect terms
.. 2k -1 -x = 0 . . . . . . subtract k+1
.. 2k -1 = x . . . . . . . . .add x
The 3rd selection is appropriate.
ANSWER
The explicit formula is :

EXPLANATION
The given sequence is
8,11,14,17,20,23,26,...
The first term is

The common difference is
d=11-8
d=3
The explicit formula is given by:

We substitute the values to get,

Answer:

Step-by-step explanation:
Given


Required
The equation of the function
The given parameters means that:


Calculate the slope (m)



The equation is then calculated using:

This gives:


Open bracket

Take LCM


Answer:
3
Step-by-step explanation:
Answer:
33
Step-by-step explanation:
Add all the numbers
Divide by 9