Question

There are 9 cookies on each plate, and there are 12 cookies in the cookie jar. Complete the table to show the total number of cookies, c, and the number of plates, p.
Function: c = 9p + 12.


P C
3 ?
4 ?
? 57
6 ?

Answer 1

P C
3 39
4 48
5 57
6 66

9(3)=27+12=39=c

9(4)=36+12=48=c

57=9p+12
-12 -12
45=9p
divide by 9 both sides 45/9=5=p

c=9(6)+12
c=54+12
c=66