molly set a function machine to multiply by 4, and then subtract 3. she made a chart, but she forgot to fill in one of the input numbers.

IN: 1 4 10 ? 31
OUT: 1 13 37 97 121

what is the missing input number in molly's chart??

A.19
B.25
C.70
D.385

Question

molly set a function machine to multiply by 4, and then subtract 3. she made a chart, but she forgot to fill in one of the input numbers. 

IN:     1      4    10     ?    31
OUT:  1    13    37   97   121

what is the missing input number in molly's chart??

A.19
B.25 
C.70
D.385

anonymous · Answer

set up an equation of 4x-3=y with x being the input and y being the output you can solve it!

anonymous · Answer

WHAT HOW CAN I SOLVE THAT??