Evaluate Expressions with Variables Quiz

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Questions and Answers

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?

  • 18
  • 15
  • 24
  • 21 (correct)

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?

<p>32 (C)</p> Signup and view all the answers

Given y = 8 and d = 4, what is the value of the expression 20 - d + y?

<p>17 (C)</p> Signup and view all the answers

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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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