The slope of a line is always zero because the line does not move up or down on the y-axis.
9 I think because 1/4 needs to have 4 of those to be a whole so yeah 9.
Answer:
12
Step-by-step explanation:
the shapes are similar which means the sides are proportional, you can set up a ratio using the sides as 10/40 = 3/x
solving that gives you x =12
Couldn't it be 54, 53 52, or 51
