The answer is A,

. This is because when plugging in -2 for x, the expression will look like this:

. To make the exponent positive, you have to flip it into a fraction. Then it will be

. Lastly, you simplify the denominator into 81.
Answer:
<em>-26</em>
Step-by-step explanation:
Given the sequence:
16, 9, 2, –5, ...,
To find:
7th measurement, if the above sequence continues:
Solution:
Let us examine the given sequence first:
First term is 16
Second term = 9
Third term = 2
Fourth term = -5
Difference between 2nd and 1st term = 9 - 16 = -7
Difference between 3rd and 2nd term = 2 - 9 = -7
Difference between 4th and 3rd term = -5 - 2 = -7
We can see that there is a common difference of -7 between each term.
That means, the sequence is in Arithmetic Progression.
whose first term, 
Common difference, 
To find:
7th term i.e. 
Solution:
Formula for
term of an Arithmetic Progression is given as:

Let us put 

7th measurement will be <em>-26.</em>
Answer:
Step-by-step explanation:
Here you go mate
Step 1
4+5y-6y+y Equation/Question
Step 2
4+5y-6y+y Combine terms
5y-6y+y
Step 3
5y-6y+y=0 Add them
4
Answer
∴4
Hope this helps
-ab-a=-(-4)(-5)-(-4)=-20+4=-16
so the answer is b