Using Formulas and Literal Equations

Section 3.6

Literal equation is an equation that involves two or more variables.

Formula is a literal equation that states a rule for a relationship among quantities.

VOCABULARY

Example: C = 2π r

Use the formula C = 2 π r to find the radius, r , for each circumference below. Round your answers to the nearest hundredth.1. C = 25 inches 2. C = 12 feet

3. C = 33 cm 4. C = 126 meters

Page 152 36 to 41

Use the formula c = 5/9 ( F – 32 ) to convert each temperature from Fahrenheit to Celsius.

1. 59 F ͦ 2. 14 Fͦ3. 149 Fͦ 4. 23 Fͦ

Page 151 numbers 14 to 17

Solve each equation for the indicated variable

1. 3m + 7 = y for m 2. A + B = C for A

3. y = mx for m 4. a + bc = d for b

5. d = rt for t

Page 151

18. T = R – M19. T = M + R20. T = M – R21. B = c – a22. B = a – c 23. A = -b – c24. A = c + b 25. d = C π26.M = y – 6 x

27. w = A l

28. t = r 3

29. c = -4p 9

30. a = qm

31. x = 7 –r a

32. b = c – 2a 2

33. x = 5 – 4y 3

34. y = 2 – 3x 7

35. b = y – 3x 3