Key Equations and formulas

• Negative Exponent ${a}^{-n}=\dfrac{1}{{a}^{n}} \text{ and } {a}^{n}=\dfrac{1}{{a}^{-n}}$
• $y=mx+b$, where $m=\text{slope}$ and $b=y\text{-intercept}$.
•  $\dfrac{a}{b}\cdot\dfrac{c}{d} = \dfrac {ac}{bd}$
•  $\dfrac{a}{b}\div\dfrac{c}{d}=\dfrac{a}{b}\cdot\dfrac{d}{c}=\dfrac{ad}{bc}$
•  $\dfrac{24}{32}=\dfrac{2\cdot2\cdot2\cdot3}{2\cdot2\cdot2\cdot2\cdot2}=\dfrac{3}{2\cdot2}=\dfrac{3}{4}$
•  $\dfrac{a}{b}\pm\dfrac{c}{d} = \dfrac{ad \pm bc}{bd}$