Algebra 1 - Chapter 2 Test

2A

• Writing expressions with variables– Number games, real life

• Plugging values into expressions– What is 2x + 5, if x=2?

• Simplifying expressions– Combining like terms, distributive property,

using arithmetic rules to play with variables

2B

• Backtracking

• Reversing Operations

• Solving equations using backtracking

2C

• Solving equations with variables on both sides

• Using expansion boxes to distribute

• Figuring out how many solutions an equation can have

2D

• Solving word problems

• Use Guess-Check-Generalize to make equations that you can use to solve equations

• Solving equations with multiple variables

Review Questions – 2A and 2B

1. Why do we need variables?

2. Simplify:1. 3(x – 1) + 4

2. 8(2y + 3) + 2(y + 1)

3. 2(3z – 4) – 4(3y – 2)

3. How do you reverse these operations?1. Add 15

2. Multiply by 8

3. Divide by ½

4. Multiply by 0

Review Questions – 2B

4. Solve using backtracking:

1. 2x + 3 = 11

2. t/2 – 9 = 0

3. (r + 1)/8 = 1

Review Questions – 2C1. Is x= -2 a solution of these equations?

1. 2x + 7 = x – 4

2. 3x – 2 = -4x – 16

3. 4(x + 2) = 2x + 4

2. How many solutions will these equations have?

1. 4(m + 6) – 12 = 2(m + 3) + 2m

2. 4 – 3t = -3t + 9

3. 5x + 10 = 5(x + 1) + 5

4. 6y – 9 = 2y

Review Questions - 2D

1. You have gotten a 75, 95, and 100 on your history tests.

1. What will your test average be if you get an 85 on the next one?

2. What grade do you need on the next test if you want to have an average of at least 92?

2. Solve for x:1. y = 7x

2. y = 7x – 2

3. y = 7(x – 1)

4. y = 7(x – 1) + 4