What is the rule in the input/output table? a) add 4 b) subtract 4 c) divide by 2 d) multiply by 2 | inputs | 4 6 and 8 | outputs | 8 10 and 12

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Can someone answer this question for me

Determine the solution for mc001-1.jpeg