I really think 90°, it looks like a 90° angle so i hope this is correct if not im very sorry!
I think it’s the second one I’m not absolutely sure but hope it helped a little
The equation to use here is 3^x = 81. You could start to try numbers, and you would realize that x = 4 weeks.
4 (x-3)=3x-4
4x-12=3x-4
4x-12-3x=3x-4-3x
x-12=-4
x-12+12=-4+12
x=8
Answer:
x= 7 y= -16
Step-by-step explanation:
plug it into the equation and it match's.
