Lesson Topics Discussion Quiz: Class Homework |
Quiz At Home |
Title: Equivalent expressions |
Grade Lesson s3-l5 |
Explanation: Hello Students, time to practice and review. Let us take next 10-15 minutes to solve the ten problems using the Quiz Sheet. Then submit the quiz to get the score. This is a good exercise to check your understanding of the concepts. |
Quiz: at Home
| Id | Name | Note |
|---|---|---|
1 |
Simplify the expression: \$ 2(x + 3) + 5x - (x^2 - 2x) \$. |
A) \$ 9x + 3 − x^2 \$ B) \$ 3x + 6 − 8x^2 \$ C) \$ 3x + 6 − x^2 \$ D) \$ 9x + 6 − x^2 \$ |
2 |
A rectangular garden has a length that is 3 meters longer than its width. Write two equivalent expressions for the garden’s perimeter (p for perimeter, w for width). |
A) \$ p = 2w + 6, p = 2(w + 3) + w \$ B) \$ p = 4w + 6, p = 2(w + 3) + 2w \$ C) \$ p = 4w + 1, p = 2(w + 1) + 2w \$ D) \$ p = 4w + 8, p = (w + 3) + 2w \$ |
3 |
Simplify the equivalent expression: \$ ((x^2 - 4) / (x - 2)) + ((2x + 3) / (x + 1)) \$. |
A) \$ (2x^3 + 3x^2 − 7x + 2) / (x^2 − x − 2) \$ B) \$ (x^3 + 3x^2 − 7x + 2) / (4x^2 − x − 2) \$ C) \$ (x^3 + 3x^2 − 7x + 2) / (x^2 − x − 2) \$ D) \$ (x^3 + 3x^2 − 7x + 2) / (x^2 − 6x − 2) \$ |
4 |
Find the values of x that make the following expressions equivalent: |
A) \$ −2 < x < −1 and x > 2 \$ B) \$ −1 < x < −1 and x > 2 \$ C) \$ −2 < x < −4 and x > 2 \$ D) \$ −2 < x < −3 and x > -2 \$ |
5 |
Simplify the expression: \$ ((2x + 1)/(x - 2)) + ((x - 3)/(x + 2)) \$. |
A) \$ (3x^2 + 8)/(x^2 − 2) \$ B) \$ (3x^2 + 8)/(x^2 − 4) \$ C) \$ (3x^2 + 7)/(x^2 − 4) \$ D) \$ (x^2 + 3)/(x^2 − 3) \$ |
6 |
If b and d are positive numbers, which of the following is equivalent to \$\sqrt((b + d)^2)\$. \$\sqrt((b + d))\$? |
A) \$(b + d)^4\$ B) b + d C) \$(b + d)^2\$ D) \$(b - d)^4\$ |
7 |
Which of the following expressions is equivalent to \$4(x^2 - 3x + 2)\$. |
A) \$4(x^2 + 6x + 4)\$ B) \$4(x^2 + 12x + 2)\$ C) \$4(x^2 - 6x + 8)\$ D) \$4(x^2 - 12x + 8)\$ |
8 |
Two workers, C and D, can complete a painting job together in 8 hours. Worker C alone can complete the job in 12 hours. Write an expression for the time it takes worker D to complete the job alone, and solve for it. |
A) 20 hrs B) 28 hrs C) 24 hrs D) 18 hrs |
9 |
Are the expressions \$(\sqrt(y - 3)^2)\$ and y - 3 equivalent? |
A) Yes, the expressions are always equivalent for all values of y. B) Yes, the expressions are equivalent if y ≥ 3. C) Yes, the expressions are equivalent if y ≤ 3. D) No, the expressions are never equivalent for any values of y. |
10 |
Simplify the expression: \$3(a − 4) + 2a − (a^2 + 3a)\$. |
A) \$-a^2 + 8a - 12\$ B) \$-a^2 + 5a - 12\$ C) \$a^2 + 2a - 12\$ D) \$-a^2 + 2a - 12\$ |
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