what do they mean by find the sum of

28g +14g
and how do I do it

sorry it was with base 9 in both numbers

anyone?

is the answer 151 base 9

In order to find the sum of 28g and 14g, you need to add them together. The "g" represents the unit of measurement, which is grams in this case.

To add the two values, you simply add the numerical values and keep the same unit "g" at the end. So, adding 28g and 14g would give you a sum of 42g.

Mathematically, it would look like this:
28g + 14g = 42g

In general, when you have similar units, like grams in this example, you can directly add or subtract the numerical values while keeping the unit unchanged.