Find the missing factor (6 + 3) + 5 = (3 × _?_ ) + 5

(6+3)+5=(3x?)+5

9+5=(3×3)+5

14=9+5

14=14

so,the missing factor is 3.

the forst and 3rd

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,