Answer: 
Step-by-step explanation:
For this exercise it is important to remember the following:
1. By definition, the "Product" is the result of a multiplication.
2. The "Difference" is defined as the result of a subtraction.
3. The Distributive property states that:
Keeping the above on mind, you know that:
"The difference of 
and 
" can be represented with the following expression:
Therefore, "The product of -13 and the difference of and " can be represented with this expression:
Finally, you must apply the Distributive property in order to simplify the expression. You get:
I think the Samsung TV might have already had 5% off but I don't know if I interpreted the question right or not.
the Sony one says AND 55% off but the Samsung one says WITH 5% off
take that how you want I guess
The given lines are perpendicular to each other.
Further explanation:
Given lines are:
Line 1: y= -9/5x + 1/5
Line 2: y= 5/9x + 2/9
As the lines are in slope=intercept form, the co-efficient of x are their slopes
Let m1 be the slope of line 1 and m2 be the slope of line 2
Then
As we can see that the product of slopes of both lines is -1. The product of slopes of perpendicular lines is -1.
The given lines are perpendicular to each other.
Keywords: Slope, slope-intercept form
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