The cost price of 16 notebooks is equal to the selling price of 12 notebooks. Find the gain per cent.

In which figure is de bc ? a. figure 1 b. figure 2 c. figure 3 d. figure 4

If the slope of one line equals the slope of another line then ? a) the two lines are intersecting lines b) the two lines are perpendicular lines c) the two lines are parallel lines d) the two lines always have very steep slopes

Can someone me out here and the tell me the greatest common factor