Answer:
16
Step-by-step explanation:
<u>Using PEMDAS:</u>
3 + 9 x 2 - 5
= 3 + 18 - 5
= 21 - 5
= <u>16</u>
Y directly proportional to X
Y=kX ( k =constant)
30=6k
k=30/6
k=5
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3
2110
4100-1990=2110