To find out how much money, \( m \), Kayla’s mom can spend on each guest’s goody bag, we need to first calculate the total cost of the food for the 12 friends. Since the food costs $5 per person, the total cost for food will be:
\[ 12 \times 5 = 60 \]
Now, we subtract the total food cost from the budget to find out how much is left for the goody bags. The remaining amount after paying for food is:
\[ 150 - 60 = 90 \]
This remaining amount of $90 needs to be distributed equally among 12 guests for their goody bags. Therefore, the expression representing the total amount available for goody bags will be:
\[ 12m = 90 \]
Where \( m \) is the amount Kayla’s mom can spend on each goody bag.
If we express this as an equation involving the total budget, it would actually be:
\[ 12m + 60 = 150 \]
Since it was asked for an expression that focuses on how much is left for goody bags while still tying back to the total budget constraint and what has already been spent, the correct expression among the provided responses is:
12m + 5 = 150 (This is incorrect as it doesn't accurately represent the situation.)
The better fit which involves the total budget, but does not match our calculations, needs to be clarified based on given options. If we strictly look for an expression where 'm' indicates money per guest:
12m + 60 = 150 would represent the correct approach but is absent in the options.
The expressions given seem flawed in context to the calculations. Please double-check the choices or present the task again for further clarity.