What attribute do a rectangle, parallelogram, rhombus, and square ALL have in common?
A) Exactly two congruent sides
B) Exactly four congruent sides
C) Exactly four right angles
D) Exactly two pairs of parallel sides

B

my answer has to be at least 20 letters

check the picture below.

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,