algebra1 STAAR prep2

A triangle has sides whose lengths in units are represented by polynomials as shown, where x is a positive integer. Which expression represents the perimeter of the triangle in units?

Which expression is equivalent to $$\left(2k^2-3m\right)\left(3k-4\right)?$$

Which expression is equivalent to $$\left(2a+5\right)\left(3a-2\right)?$$ ​ (a)  

What is the quotient represented by the expression $$\frac{8w^2-20w-12}{2w+1}$$ for all values of w where the expression is defined?​ (a)  

Which expression is equivalent to $$1.5\left(4j-10k\right)-2.5\left(8j+6k\right)?$$

Which expression is equivalent to $$\sqrt[]{50}?$$ ​ (a)  

Which expression is equivalent to $$7\ \sqrt[]{45}?$$ ​ (a)  

Which expression is equivalent to $$\sqrt[]{600}?$$

Which expression is equivalent to $$\sqrt[]{245}?$$

(a)  

Which expression is equivalent to $$2.5(3x-4y)+1.5(2y-5x)?$$