You can line up 8 cards 64 different ways.
8 * 8 = 64
9 more than y is an expression so it would be 9+y
8 - 3 = 5
D.5
to find the average you need to multiply depending on the sittuation
Answer=B
The explanatory variable is another term for the independent variable. The independent variable is the 'thing' that YOU decide to change/manipulate in an experiment. The type of nail polish given was the independent variable for this experiment.
9 squares because if there are 18 triangles in it then you divide 18 by 2 and get 9