Answer:

Step-by-step explanation:
Given
Represent point A as thus;

Required
Determine the new position of A, when rotated counterclockwise
The new position will be denoted as A'
When a point is rotated counterclockwise, we start by switching the positions of x and y as follows:

Then, y is negated to give A'

Answer:
13.
Step-by-step explanation:
x+x+5=21
2x+5=21
2x=16
x=8
Answer:
ans= 45.6
Step-by-step explanation:
I think the ans is 45.6
I hope it will help u...
Sorry i don’t understand the question can you reply to this and comment
This has infinitely many solutions if that is all that the question asked...
2x+3y=12
3y=-2x+12
y=(-2x+12)/3
So for any value of x you choose it will give you the corresponding y value that makes your original equation true.