I need help with only 4,8,10 and 12 I’m marking brainlest!

Answer:
4. [tex]\frac{1}{6}[/tex]
8. [tex]\frac{1}{2}[/tex]
10. [tex]7\frac{3}{4}[/tex] × [tex]\frac{1}{3}[/tex] = [tex]7\frac{1}{4}[/tex]
I've answered 4, 8 and 10 for you as you haven't provided 12, but I hope this helps!! ^-^