Dplus 3 < 12
a) d < -9
b) d < -15
c) d < 15
d) d < 9

Pls! does anybody know a shortcut for answering these types of questions in the future?

The ratios 3: 9, 4: 12, 5: 15, and 6: 18 are a pattern of equivalent ratios in the ratio table. which is another ratio in this pattern?

Which expression is equal to (f+g)(x)?