Question

y=2 I 3+9X I + 2,which set describe X when Y<9?

A.) (X I-9/14 15 years ago

Answer 1

2|3+9x| + 2 < 9
2|3 + 9x| < 7
|3 + 9x| < 7/2

that gives you two equations
3 + 9x < 7/2
-3 - 9x < 7/2

solve
you get
x < 1/18
x > -13/18
so C

Answer 2

thanks so much :)