Final answer:
The student's question involves solving for the measure 'm' given some angular equations. Only the first equation (m/2 = 98°) can be solved without additional context, resulting in m = 196°. The meaning of 'l3' and 'l8' in the other equations is unclear without further information.
Step-by-step explanation:
The student is asking to solve for the values of measures given some equations with angles. This appears to be a problem related to algebra and possibly geometry, as angle measures are typically discussed within these areas of mathematics. None of the provided reference information from "Challenge Problems" or "Additional Problems" directly gives us the answers to the equations m/2 = 98°, ml3 = 23°, and ml8 = 70°. To solve these, we'd have to rearrange each equation to solve for 'm', which would typically mean multiplying both sides of the first equation by 2, and similarly finding 'm' in the other two equations if they follow the standard notation where 'm' represents the measure of an angle.
Solution for the first equation: m = 2 × 98° = 196°. However, without further context or notation explanations, it's not clear what 'l3' and 'l8' indicate in the other equations, hence we cannot confidently proceed to solve for 'm' in those cases without additional information.