Write the following polynomial in coefficient form:

$5y$

If coefficient form of a polynomial, $2m^4-3m^2+7$ is $\left(k_1, 0, k_2,0, k_3\right)$, find the value of $k_1+k_2+k_3$

Write the following polynomial in coefficient form:

$-\frac{2}{3}$

Write the polynomial in index form.

$\left(1, 2, 3\right)$

Write the polynomial in index form.

$\left(5, 0, 0, 0, -1\right)$

Write the polynomial in index form.

$\left(-2, 2, -2, 2\right)$

Write the appropriate polynomials in the boxes.

Use the given letters to write the answer.

There are ‘$a$’ trees in the village. If the number of trees increases every year by ‘$b$’, then how many trees will there be after ‘$x$’ years?

Use the given letters to write the answer.

For the parade there are$y$students in each row and $x$ such row is formed. Then, how many students are there for the parade in all?