Write an expression for the statement "$9$ times $n$ is added to $10$"

Write an expression for the statement "$16$ is subtracted from two times $y$".

Write an expression for the statement "$y$ is multiplied by $10$ and then $x$ is added to the product.

Peter has '$p$' number of balls. The number of balls with David is $3$ times the balls with Peter. Write this as an expression.

Sita has $3$ more notebooks than Geetha. Find the number of books that Sita has. Use any letter for the number of books that Geetha has.

Cadets are marching in a parade. There are $5$ cadets in each row. What is the rule for the number of cadets, for a given number of rows? Use '$n$' for the number of rows.

Find the $n^{th}$ term of the following sequence

$3, 6, 9, 12, ...$