Consider the triangle below.
Find the perimeter of triangle ABC. Round to the nearest hundredth.

A) 18.86 units
B) 120 units
C) 13.47 units
D) 6.43 units

Option A is correct.

Step-by-step explanation:

Using the above mentioned distance formula, we have:

Add the length of three sides of triangles, we have:

Perimeter = 5.39+6.4+7.07 = 18.86

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,