Answer:
73
Step-by-step explanation:
First add the one with the same denominator.
15[tex]\frac{9}{12}[/tex] + 23[tex]\frac{3}{12}[/tex] = 38[tex]\frac{12}{12}[/tex] = 39
8[tex]\frac{13\\}{17}[/tex] + 25[tex]\frac{4}{17}[/tex] = 33[tex]\frac{17}{17}[/tex] = 34
Then add the answers of those equations.
39 + 34 = 73
