if an ordered pair is a solution, it should satisfy the equation.
see the first option
, if you put $x=4$ and $y=12$
you'll get $12=12$ which is true.
now the last option, $y=8-x$ put $x=4$ and $y=12$
$12=8-4\implies 12\ne4$ thus it is not a solution.
So option 4 is correct
0.7 = 7/10
One digit after the decimal point is the tens place
0.7 also equals 70/100, which can be simplified to 7/10, but 7/10 cannot be simplified
Answer:
8.
Step-by-step explanation:
The true answer is <span>t ≥ 49</span>
