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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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