Ineed to find 'x' and i don't know how to

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

1. if we have 3 babies what is the probability they’re going to be all boys? 2. if we roll 2 die at the same time what is the probability of getting less than 10 on the first roll and a 5 on the second roll 3. if we have 3 babies what is the probability their is going to be 2 girls? 4. if we have 3 babies what is the probability of having no more than 1 girl? 5. it we have 3 babies and then have another 3 babies what is the probability of us having at least 1 boy and then having all girls?

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83