Question

Solve the compound inequality 30 < 10u < 120.

3 < u < 4

3 > u > 12

3 > u > 4

3 < u < 12

Answer 1

you are solving for u. So how do you get alone.

Answer 2

its D is the answer:

, 30 < 10u < 120

so

30<10u & 10 u < 120


so,

u>3 & u < 12

hence

3<u<12

last option