51h + 35m
Explanation:
For the first option, you can’t combine two different terms. Both would have to be represented by h or by m to put the two together.
On the second option, you wouldn’t multiply the two together either because in the problem, Bianca is doing hair AND makeup which is a keyword for adding.
The third and final option is the correct one because it’s leaving the two values separate and still adding them together.
