math please help! really confused on what the steps are

For any expression of this kind:
[tex]\begin{gathered} x\div y=z \\ x=Dividend \\ y=divisor \\ z=quotie_{}nt \end{gathered}[/tex]9.
For this expression:
[tex]\begin{gathered} 7.5t+(30\div6)-13 \\ 30\div6=5_{} \\ 5\text{ is the quotient} \end{gathered}[/tex]10. The product of two factors is:
[tex]7.5\times t=7.5t[/tex]