MATH 7 Week 4 Day 1 "What I know"

1. Which of the following below are like terms?

• A. 2𝑥, 3𝑥, 4𝑥, 5𝑥

• B. 4𝑎, −3𝑎, −2𝑎,𝑎𝑏

• C. 3𝑥,𝑥²,𝑥³, 𝑥⁴

• D. 𝑥𝑦 , 3𝑥𝑦 , 5𝑦, 4𝑧

2. Which of the following would result to a sum of 5ab?

• A. 2𝑎 + 3𝑏

• B. 4𝑎 + 𝑏

• C. 2𝑎𝑏 + 3𝑎𝑏

• D. 3𝑎 + 2𝑏

3. What is the simplified term of 3𝑥 + 𝑥 – 2𝑥 + 5𝑥 ?

• A. 6𝑥

• B. 7x

• C. 8x

• D. 9x

4. What must be subtracted from 8𝑎 + 3 to make a difference of 5𝑎 + 1 ?

• A. 3𝑎 + 2

• B. 3a - 2

• C. 3𝑎 + 4

• D. 3𝑎 – 4

5. Mark saved 15𝑥 + 8 from his allowance. How much did he have after buying a gift worth 10𝑥 + 3 for his mother’s birthday?

• A. 5𝑥 − 5

• B. 5𝑥 + 5

• C. 5𝑥 − 11

• D. 5x + 11

6. Which of the following statements illustrates the law: 𝑎ⁿ ∙ 𝑎^m = 𝑎^n+m ?

• A. 2³ ∙ 3⁴ = 6⁷

• B. 3³ ∙ 2⁵ = 6¹⁵

• C. 2³ ∙ 2⁴ = 2¹²

• D. 3² ∙ 3⁴ = 3⁶

7. Which of the following illustrates the law 𝑎ⁿ = 𝑎 ∙ 𝑎 ∙ 𝑎 ∙ 𝑎 … ∙ 𝑎 (𝑛 times) ?

• A. 𝑥⁵ = 𝑥 ∙ 𝑥 ∙ 𝑥 ∙ 𝑥 ∙ 𝑥

• B. 2³ = 3 ∙ 3

• C. 3⁴ = 3 ∙ 4

• D. 𝑥⁵ = 𝑥 ∙ 5

8. Which of the following is true?

• A. 5² + 5³ = 5⁵

• B. 2²/2³ = 1/2

• C. (3²)⁹ = 9¹⁸

• D. (4³)² = 4⁵

9. Divide (4𝑥² − 24𝑥 + 35) ÷ (2𝑥 − 5) .

• A. 2x – 7

• B. 2x + 12

• C. 2x – 12

• D. 2x + 7

10. The length of the rectangle is 2x – 3 and its width is equal to x – 1. Find the area of the rectangle.

• A. x – 2

• B. 3x – 4

• C. 2x² – x – 3

• D. 2x² – 5x + 3