In a bag of gum balls, 30% of the gum balls are blue. There are 12 blue gum balls in the bag. How many total gum balls are in the bag? 4-
38
36
22

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

6x = 48

i hope this . 6 cards each and a total of $48. dvide each side by 6 and you will have your answer.

step-by-step explanation: