Answer:
<h2><u>7</u>x - <u>7</u>y + <u>21</u> </h2>
Step-by-step explanation:
7(x - y + 3)
=> 7 × x - 7 × y + 7 × 3
=> <u>7</u>x - <u>7</u>y + <u>21</u>

Substitute x = 3 in any given equations. I will do in y = - x + 1

Therefore the answer is (3,-2)
Answer:
C. hyperbola; 
Step-by-step explanation:
The given conic has equation:

Divide through by 225.


This is a hyperbola centered at the origin.
The hyperbola has been translated from the origin to (0,5).
The translated hyperbola will have equation;

Multiply through by 225.

Expand


Rewrite in general form;


To get perimeter, you simply add all the side lengths. So we will ad 23.2 + 23.2 + 12 + 12 = 70.4
The perimeter is 70.4 m