So if QR and PQ are the same ( which they are bc the angles and other sides are the same) 3n-1= 5n-7 so -1= 2n -7 so 6 = 2n so n = 3 then QR is 5n -7 so 5 x 3 is 15-7 is 8 so the answer is 8. Hope this helps :)
The third option is the correcto answer
The value of k that makes the inequality have no solution is -2 .
<u><em>Explanation</em></u>
Given inequality is....

First we will get only the x-terms together in left side. So....

Now <u>for getting no solution, the co efficient of 'x' should be 0</u>. That means...

So, the value of 'k' for getting no solution will be -2.