2. ABCDE 1 111 22 2 22 3 3 33 3 1 DefinitionsFunctionsRate/Ratio FormulasSolving

3. A1 Each time you apply a solution step to an equation, you are writing a _______________.

4. A2 An algebraic equation that relates two or more real-life quantities is a _______________.

5. A3 A ___________ is used to compare two quantities with different units, such as miles per hour.

6. B1 Solve the equation. y – 15 = – 4

7. B2 Solve the equation. 9( - 5 – r) = -10 – 2r

8. B3 Solve the equation. 0.9m + 2.4 = - 0.3m

9. C1 Use the formula for the area of a rectangle, A = lw, to find a formula for l in terms of A and w.

10. C2 In the equation S = 2  rh solve for h.

11. C3 What is the formula to find the temperature in Fahrenheit? C = 5 (F – 32) 9

12. D1 Rewrite the equation so that y is a function of x. 2x + y = 5

13. D2 Rewrite the equation so that y is a function of x. 2x + 2y = 10

14. D3 Rewrite the equation so that y is a function of x. 3x + 5y = 7

15. E1 You earn $210 in 40 hours. At this rate, how much do you earn in 55 hours?

16. E2 You are visiting Mexico and you want to exchange $180 for pesos. The rate of currency exchange is 9.990 pesos per United States dollar. Find out how many pesos you will receive.

17. E3 The two triangles are similar. Find the length of the side marked x. x 9 8 6

18. A1 Each time you apply a solution step to an equation, you are writing a transformation.

19. A2 An algebraic equation that relates two or more real-life quantities is a formula.

20. A3 A unit rate is used to compare two quantities with different units, such as miles per hour.

21. B1 Solve the equation. y – 15 = – 4 y = 11

22. B2 Solve the equation. 9( - 5 – r) = -10 – 2r r = - 5

23. B3 Solve the equation. 0.9m + 2.4 = - 0.3m m = - 2

24. C1 Use the formula for the area of a rectangle, A = lw, to find a formula for l in terms of A and w. l =A w

25. C2 In the equation S = 2  rh solve for h. h= S. 2  r

26. C3 What is the formula to find the temperature in Fahrenheit? C = 5 (F – 32) 9 F = 9 C + 32 5

27. D1 Rewrite the equation so that y is a function of x. 2x + y = 5 y = 5 – 2x

28. D2 Rewrite the equation so that y is a function of x. 2x + 2y = 10 y = 5 - x

29. D3 Rewrite the equation so that y is a function of x. 3x + 5y = 7 y = 7 – 3 x 5 5

30. E1 You earn $210 in 40 hours. At this rate, how much do you earn in 55 hours? $288.75

31. E2 180 dollars to pesos? Rate of currency exchange = 9.990 pesos 1 dollar 1798 pesos

32. E3 The two triangles are similar. Find the length of the side marked x. x = 12 x 9 8 6