Find the intersection of the three sets a={-2,7,8,9} b={-2,5,9} c={-2,5,9}

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

the 3rd on is correct

step-by-step explanation:

you'll have to attache the image of the bar graph in order for us to answer : )

step-by-step explanation: