Answer:
If you are just looking for a simplified answer then the answer is -7x - 3.
A is correct. Hope my answer helped u :)
The sum of the first five terms is 11/2
<h3>How to determine the sum?</h3>
The series is given as:
1/2, -1,2,-4…
Calculate the common ratio of the series using
r = -4/2
Evaluate
r = -2
The sum is then calculated as:

This gives

Evaluate

Evaluate

Hence, the sum of the first five terms is 11/2
Read more about series at:
brainly.com/question/11346378
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Answer:

Step-by-step explanation:
Relation between acceleration, velocity and position:
The velocity function is the integral of the acceleration function.
The position function is the integral of the velocity function.
Acceleration:
As given by the problem, the acceleration function is 
Velocity:

In which K is the constant of integration, which is the initial velocity. So K = -3 and:

Position:

In which K, the constant of integration, is the initial position. Since it is 12:

Answer:
4
Step-by-step explanation:
4=x
5x+7 =27
27=27
:(((