Name the property of equality or congruence that justifies going from the first statement to the second statement.
st=qr
qr=st

a) reflexive property of congruence
b) symmetric property of congruence
c) transitive property of congruence
d) substitution property of congruence

b) symmetric property of congruence

Step-by-step explanation:

Congruence :

Two figures are said to be congruent if they overlap each other .

Reflexive property of congruence :

Reflexive property of congruence states that the figure is congruent to itself .

Symmetric property of congruence :

Symmetric property of congruence states that if one figure is congruent to the other figure then the other figure is also congruent to the given figure .

Transitive property of congruence :

Transitive property of congruence states that if figure A is congruent to B and figure B is congruent to C then figure A is congruent to C .

Substitution property of congruence :

If two figures are congruent such that some property applies to both the figures then we can replace one figure with the other .

Given :

ST = QR and QR = ST

So, Symmetric property of congruence justifies going from the first statement to the second statement .

all it means is function 3

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,