If 20 articles cost ? 90, then the cost of 9 articles is ? ? 45

?4.50

?
? 40.50

How do you solve a question like this?

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Line segment eg is partitioned by point f in the ratio 1: 1. point e is at e (0, 4), and point f is at (1, 3). what are the coordinates of point g? (−1, 5) (2, 2) (3, 1) (4, 0)