Answer:
I think like expressions you use x or y or such many variables. you use - or + too. like (x+2)y there are parentheses too.
Answer:
Angle <u>A</u><u> </u>= 15°
use angle properties of triangle to solve this.
Answer:
positive
Step-by-step explanation:
Addd 4 to both sides

sqare both sides
x+9=25
minus 9 both sides
x=16
plug it in for x and see



1=1
true
not extraneous
an extraneous root would be x=-34