Question

Solve the compound inequality 60 < 20u < 120

Answer 1

you have 20u, but you just want 'u'

so you have to divide all sides by 20 to isolate 'u'

Answer 2

i got 3 & 6 but which way the arrows go ? this way << or >>

Answer 3

the inequality signs stay the same

Answer 4

so you would have

3 < u < 6

Answer 5

oh ok

Answer 6

the arrows dont change...
60 < 20u < 120 (divide by 20 to get u by itself)
60/20 < 20u/20 < 120/20
3 < u < 6