Change of Subject

Change the subject of the formula
$\displaystyle s=ut+\large\frac{1}{2}\normalsize at^2$ to $\displaystyle a.$

Change the subject of the formula $\displaystyle L=\sqrt{4kt-p}$ to $\displaystyle k$.

Change the subject of the formula $\displaystyle F=\frac{t^{2}+4b}{c}$ to $\displaystyle b.$

Change the subject of the formula $\displaystyle y=g\sqrt{x}+h$ to $\displaystyle x$.

The area of a trapezium is given by the formula
$\displaystyle A=\frac{1}{2}h(x+y).$
Make $\displaystyle x$ the subject of the formula.

Change the subject of the formula
$\displaystyle d=\sqrt{\large\frac{3h}{2}\normalsize }$ to $\displaystyle h\small.$

Change the subject of the formula $\displaystyle D=\frac{B+4}{C^{2}}$ to $\displaystyle B$.

Change the subject of the formula
$\displaystyle P=\large\frac13\normalsize mn-r$ to $\displaystyle m.$

Change the subject of the formula $\displaystyle f = \frac{2d+3}{e}$ to $\displaystyle d.$

Change the subject of the formula $\displaystyle B = \frac{1}{4}kc^{2}-3c$ to $\displaystyle k.$