Answer:

Step-by-step explanation:
Given
Function; 
Required
Find an equation perpendicular to the given function if it passes through (-3,9)
First, we need to determine the slope of: 
The slope intercept of an equation is in form;

<em>Where m represent the slope</em>
Comparing
to
;
We'll have that

Going from there; we need to calculate the slope of the parallel line
The condition for parallel line is;

Substitute 

Divide both sides by -2


The point slope form of a line is;

Where
and 
becomes

Open the inner bracket

<em>Hence, the point slope form of the perpendicular line is: </em>
<em />
<em />
<u>Answer:</u>
<u>Step-by-step explanation:</u>
<em>Rule: An absolute value will always be positive. </em>
<em>=> Referring to the rule, the absolute value of |–3.25| is 3.25.</em>
Hoped this helped.

Answer:
9x -2
Step-by-step explanation:
(7x + 3) + (4x - 1) - (2x + 4)
Distribute the minus sign
(7x + 3) + (4x - 1) - 2x - 4
Combine like terms
7x+4x-2x +3 -1-4
9x -2