Quadrilateral never has four equal sides?

that is true because A parallelogram has two pairs of parallel sides. A quadrilateral has interior angles that add up to 360 degrees. A square has four equal sides and four right angles. A kite is a parallelogram only when it is a rhombus.

Step-by-step explanation:

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,