7.75+1.25x= 32.75
32.75-7.75=25
1.25x= 25
25 divided by 1.25
X= 20
The complete factorized form for the given expression is 
<u>Step-by-step explanation:</u>
Step 1: Given expression:

Step 2: Trying to factor as a Difference of Squares
Factoring 
As we know the theory that the difference of two perfect squares,
can be factored into (A+B) (A-B)
from this, when analysing, 81 is the square of 9,
is the square of
. Hence, we can write the given expression as,

By using the theory, we get

Again, we can further factorise the term 
is the square of
. Therefore, it can be expressed as below

Now, we can not factorise further the term
. Because it will come as
(3 is not a square term). Thereby concluding that the complete factorisation for the given expression is 
Answer:
the answer is 900
Step-by-step explanation:
the 900 will not be necessary
If you mean parallel to another line, you have to find the the equation of that line. Lets just say it was y= 7x-2. To find the slope of a line parallel to that, then you look at the slope of that line, which in this case would be 7. The slope of a line parallel would have to be the same. So, I can't give you a direct answer because I can't see the graph but that is how you get the answer.
Answer:
Step-by-step explanation:
Since both the triangles are similar, their sides will be in proportion. As one side is getting doubled, by SSS test of similarity, all the other sides will get doubled as well.
As the perimeter of a triangle is sum of its sides, the doubling of all sides will result in doubling of the perimeter.
Hence, perimeter of 2nd triangle = 14 cm.