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Study Guides > ALGEBRA / TRIG I

Summary: Using Formulas to Solve Word Problems

Key Concepts

Distance, Rate, and Time Formula

  • d=rtd={r}{t}
Where dd is distance, rr is rate, and tt is time.

Simple interest earned in an account can be defined by the formula

  • I=Prt\displaystyle I=P\,\cdot \,r\,\cdot \,t
Where I is the interest earned, P is principal, r is the interest rate, and t is time.

Conversion formula for Fahrenheit to Celsius is

  • C=(F32)59C=\left(F--32\right)\cdot \frac{5}{9}
Where F is degrees in Fahrenheit and C is degrees in Celsius

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