Answer:
or 
Step-by-step explanation:
Assuming the question to be finding the value of b.
Solution:
Rewrite the equation as.

first we solve right side of the equation.



Add 23 both side of the equation.




or

Therefore, the value of
or 
Answer:
a line of symmetry is a line divide an object in to two equal parts. answer is A
Answer:
Step-by-step explanation:
The slope of a line given two points
and
is

Answer:
x<4
Step-by-step explanation:
-2x+20<2x+4
−2x+20−2x<2x+4−2x
−4x+20<4
−4x+20−20<4−20
−4x<−16
−4x/-4<-16/-4
x<4 its a open circle