Can someone help me with this problem it’s question number 6

Answer:
[tex]\frac{57}{16}[/tex] lb
Step-by-step explanation:
[tex]\frac{7}{8} +1\frac{3}{4} +\frac{15}{16}[/tex]
Change the mixed fraction into an improper fraction,
[tex]\frac{7}{8} +\frac{7}{4} +\frac{15}{16}[/tex]
Now convert the denominator to 16 (since 8 and 4 are factors of 16)
And remember that what you do to the denominator, you must do the same to the numerator!
[tex]\frac{14}{16} +\frac{28}{16} +\frac{15}{16}[/tex]
Now that we have all fractions with the same denominator, we can simply add all the numerators together,
= [tex]\frac{57}{16}[/tex]
It cannot be simplified any further, so this is your answer!
Hope this helped!!