Math · Age 11 · Algebra
Substitution into Expressions (Ex. 2)
Substitute values into formulas and check results using inverse operations.
Module
Algebra
Age
Age 11
Duration
10 min
Questions
5
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Question 1
Multiple choice
The formula for temperature conversion is F = 1.8C + 32. What is F when C = 20?
Question 2
Multiple choice
Evaluate −3a + b when a = 4 and b = −2.
Question 3
Multiple choice
Find the value of 2(x + y) − z when x = 3, y = −1, and z = 4.
Question 4
Sequence
Use the formula E = mc² to find E when m = 3 and c = 5. c² = 25. E = 3 × 25 = ___.
Question 5
True or false
When substituting x = −2 into the expression 4x + 6, the answer is −2.