State whether each of the following statements is true or false

$\sqrt{49}$ is an irrational number.

Represent geometrically numbers on the number line:

$\sqrt{2.3}$

For each question, select the proper option from four options given, to make the statement true : (Final answer only)

If $(\sqrt{5}+3)^{2}=a+b \sqrt{5},$ then........

If $x=7-4 \sqrt{3},$ then find the value of $x^{2}+\frac{1}{x^{2}}$

Simplify the following:

$4 \sqrt{28} \div 3 \sqrt{7}$

Find the value

$(343)^{-\frac{2}{3}}$