Is AB tangent to the circle?

Yes, AB is tangent to the circle

Step-by-step explanation:

If AB is tangent to the circle, the triangle will be a right triangle, so if:

11.4² + 15.2² = 19²

129.96 + 231.04 = 361

361 = 361

so it is tangent

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.

step-by-step explanation:   divide the numerator by the denominator to get the decimal

it would still be 193

if divide by 100 then 1.93

i am not sure