Identify the reason that justifies the following statements. 19) 1=~4
20) 2+4+5 = 180
21) 5+7=180
22) 4+2=7
23) If CA bisects DCB, then 1 =~ 2
24) 3+7=180

Possible reasons:

A. Triangle exterior angle theorem
B. Vertical angles are congruent
C. Angle addition postulate
D. If lines are parallel, then alternate interior angles are congruent
E. If lines are parallel, then corresponding angles are congruent
F. If lines are parallel, then same side interior angles are supplementary
G. Definition of midpoint
H. Definition of angle bisector
I. The sum of the angles of a triangle is 180

step-by-step explanation:

if u want da anser kill your teeser ifu hav wun

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places