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Questions and Answers
What is the value of the expression 29 - x when x = 6?
What is the value of the expression 29 - x when x = 6?
- 23 (correct)
- 35
- 20
- 30
What is the value of the expression 3x + x when x = 6?
What is the value of the expression 3x + x when x = 6?
- 18
- 15
- 24
- 21 (correct)
If b = 2 and c = 7, what is the value of the expression 4c + b?
If b = 2 and c = 7, what is the value of the expression 4c + b?
- 28 (correct)
- 25
- 29
- 33
For y = 8 and d = 4, what is the value of the expression yd/2?
For y = 8 and d = 4, what is the value of the expression yd/2?
Given y = 8 and d = 4, what is the value of the expression 20 - d + y?
Given y = 8 and d = 4, what is the value of the expression 20 - d + y?
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Study Notes
Evaluating Expressions
- Evaluate expressions for given values of variables.
Evaluating for x = 6
- 7x = 7(6) = 42
- 11/3 = 3.67 (approximately)
- 36 is a constant value
- 29 - x = 29 - 6 = 23
- 5 is a constant value
- 9x = 9(6) = 54
- x + 41 = 6 + 41 = 47
- 3x + x = 3(6) + 6 = 24
- 2x - 2 = 2(6) - 2 = 10
Evaluating for b = 2 and c = 7
- 5 + b + c = 5 + 2 + 7 = 14
- 16 + b - c = 16 + 2 - 7 = 11
- c - b + 1 = 7 - 2 + 1 = 6
- 9b - c = 9(2) - 7 = 11
- 7c - b = 7(7) - 2 = 47
- 4c + b = 4(7) + 2 = 30
- 12b + c = 12(2) + 7 = 31
- 22 + b - c = 22 + 2 - 7 = 17
Evaluating for y = 8 and d = 4
- 18 is a constant value
- 20 + d + y = 20 + 4 + 8 = 32
- yd = 8(4) = 32
- 1 / (y/2) = 1 / (8/2) = 1 / 4 = 0.25
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