Real Number System & Algebraic Expressions

Consider the following expression: 7+3x

The number ​ (a)   represents a coefficient and the number​ (b)   represents a constant.

Which numbers below represent perfect squares?

If x=-2 and y=5, what is the value of y-x?

Which is equivalent to $$\left(\frac{-2x^3}{3}\right)^2$$

What is the value of $$4p^{\frac{2}{3}}$$ when p=8?

_ is the value of $$3^t$$ when t=-2.

(a)  

Which of the following will always be an irrational number? Select two.

Which is equivalent to $$\sqrt[]{50}+\sqrt[]{8}$$

Organize these options into the right categories

If x=-5 and y=3, what is the value of

7-(y+1)-2x ?