Question

pls help asap! It’s due in one hour!!

1. x+y= 7
7x + ty = 77
The system above has NO SOLUTION when t= ?

2. x+y=7
7x+ty=49

The system above has INFINITELY MANY SOLUTIONS when t= ?

Answer 1

1. t = 7
2. t = 0
i think? although I’m not 100% sure