Answer:
The first question- 2-1.8 centimters, just subtract 49.2 from 51
The second question-2-1.052 meters, just divide
The thirs question-3-115, just divide
Answer:

Step-by-step explanation:
Slant asymptote: It is a non-vertical and non-horizontal line graph approaches this line but the graph never crosses it. It exists when degree of numerator is greater than that of denominator. It can be calculated by dividing numerator by denominator.

Answer:
1st one
Step-by-step explanation:
it is just rearranged
Remember that when there is no sign in front of the first one, there is an invisible plus/positive sign
Answer:
When we have a rectangle of length L and width W, the area is calculated as:
A = W*L
In this case, W = x, and the area is:
A = 2*x
Then we must have L = 2.
We know that the area of the window and the frame (together) is:
a = 2*x^2 + 12*x + 16
The area of the frame alone, will be equal to the difference between the area of both objects (a) and the area of the window alone (A)
area of the frame = a - A
= (2*x^2 + 12*x + 16) - (2*x) = (2*x^2 + 10*x + 16)
This is the area of the frame
Ax + c = R (subtract c from each side)
Ax + c - c = R - c
Ax = R - c (divide A from each side)
Ax/A = (R-c)/A
x = 
<-answer