The Formula's for a cylinder is V=

r^2h and the volume of a Cone is V=1/3

r^2h. So you would know that the volume of a cone is 1/3 the volume of a cylinder.
Number three is a parallelogram
Number four is a rhombus
The attributes of each quadrilateral is that it must have four sides
Number seven is true because if you fold a rectangle in half it will be congruent and rectangles always have at least one parallel side
Number eight is false because a square has all equal length sides and a rectangle does not have all equal sides making the two very different
HOPE THAT HELPS!!!!!!
Answer:
2
Step-by-step explanation:
2 is a value of x that would not make the set a function because a function can't have multiple coordinates wit hthe same domain (x-coordinate). 2 is a domain that has already been used in the point (2,7). If this is used in (x,5), the point would become (2,5) and repeat a domain.
Note:
The x-coordinate could also be 1 or 6 because they have been used as domains as well.
Hope it helps!