3.6 Literal Equations and Formulas

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Presentation transcript:

3.6 Literal Equations and Formulas Literal “letter” equations: an equation that uses more than one letter as a variable. D=rt A=bh C= d I=prt You can solve the equation for any of the variables.

Practice For D=rt solve for r D = rt t t D = r t

Practice For P=2b + 2h, solve for h P = 2b + 2h -2b -2b P - 2b = 2h

Practice For I = prt solve for p (Interest = principle ∙ rate ∙ time) I = prt rt rt I = p rt

Try these I = prt pr pr I = t pr 50____ = t 350 (.10) 50 = t 35 ~1.43 years = t How long will it take me to make $50 interest on $350 at 10% interest? Remember to use I=prt

Try these x = 4y – 16 6 Solve for y 6x = 4y – 16 +16 +16 x = 4y – 16 6