The derivatives for this problem are given as follows:
a) 
b)
.
<h3>What is the derivative of the sum?</h3>
The derivative of the <u>sum is the sum of the derivatives</u>.
In this problem, the function is:

Using a derivative table for the derivatives of the cosine and the ln, the derivative of the function is:


What is the product rule?
The derivative of the product is given as follows:

In this problem, we have that:
.
.
Hence the derivative is:
.
More can be learned about derivatives at brainly.com/question/2256078
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If i’m understanding this correctly -9 + -4 is equal to -13 so wouldn’t you just add 13 to make it 0?
sorry if this is confusing
Solve the following system of equations:
2x + 3y = 40
-2x + 2y = 20
We can add these equations to get a new equation. Then we can solve for y:
0 + 5y = 60
5y = 60
y = 12
2x + 3y = 40, plug in y = 12 and solve for x:
2x + 36 = 40
2x = 4
x = 2
Choice A