Answer:
C) They are perpendicular lines.
Step-by-step explanation:
We first need to find the slope of the graph of the lines passing through these points using:

The slope of the line that passes through (−12, 15) and (4, −5) is


The slope of the line going through (−8, −9) and (16, 21) is



The product of the two slopes is

Since

the two lines are perpendicular.
Answer:
50.29in
Step-by-step instructions:
First find the semi-circular part:- 1/2×2πr
=1/2×2×22/7×9
=28.29
Find whole perimeter:- 28.29+5+5+12 = 50.29 in
It can be a variety of numbers!
10+18 is 28
Answer:
Step-by-step explanation:
i think you will replace x and y respectively,as in take 1\3 as x and -7\2 as y and so on as the next question
Solution:
we are given that

As we know that

Substitute the value we get

Since 
So here 
As we know that

Hence the correct option is C.