Question

please answer the third question fast its my humble request​

Answer 1

Step-by-step explanation:

the given system of equation is

$x + 2y = 5$

and

$3x + ky + 15 = 0$

for unique solution ,we must have

$\frac{a1}{a2} \: \not = \: \: \frac{b1}{b2}$

:-

$\frac{1}{3} \: \: \not = \: \: \frac{2}{k}$

$k \: \not = \: 6$

hence the given system of equation will have a unique solution when

$k \: \not = 6$

Answer 2

Step-by-step explanation:

I hope this will help you. Thank you.