Answer:
b)21
Step-by-step explanation:
f(-6) = 9 - 2 × (-6) = 9+12=21

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Answer: =A.

Solution:







,
<h2>so the answer is = A.</h2>
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Explanation:
#Carry on learning
4^10 and x^4 are the right answers
The equivalent expression to 
<h3>What are the equivalent expressions?</h3>
Equivalent expressions are similar expressions that may have different forms but when a value is replaced with the variables in the same form provides the same answer.
From the information given, If:
- r(x) = 3x - 1
- s(x) = 2x + 1
Then the fractional form can be an expression as:

where;



Learn more about equivalent expressions here:
brainly.com/question/24734894
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To solve this problem you must apply the proccedure shown below:
1. You must multiply the coordinates of
by the scale factor given in the problem above. Therefore, you have that the coordinates of
are:

2. The midpoint of
has the folllowing coordinates:

3. The center of dilation is a fixed point, with coordinates
. Therefore, the distance from the center of dilation to the midpoint of
is:

The answer is the option C: 