Slope of the line passing through (7,-5) and (3,11) =

= -4
As two lines are perpendicular to each other, so when their slopes are multiply by each other, the answer will be -1
so the slope of the line passing through (-3,-9) and (5,n) will be

So will will get a formula below

and the answer will be n=
Answer:
Find the rate of sales tax
R= 9000/120000
=0.075
=7.5%
So, the rate is 7.5%

Let's put these as improper fractions.
30 = 60/2. add the 1/2 to get 61/2
13 = 52/4. add the 3/4 to get 55/4

To add/subtract fractions, they must have the same denominator. (bottom no.)
If we multiply the top and bottom of a fraction by something, it stays equal.
We can conclude that 61/2 = 122/4. (bottom multilpies by 2, so does the top)

Now that we have a common denominator, we can subtract.
The "fourths" just sort of acts like a unit. Subtract 55 from 122 to get

.
We can convert this to an improper fraction simply by dividing 67 by 4.
This leaves us with 16, and a remainder of 3. Our answer is
Answer:
I think may be it is Option 2 (AB)