Advanced MathEasySubstituting into a linear expression
Advanced Math practice question
When x = 3, what is the value of 2x + 4?
Answer: 10
2(3) + 4 = 6 + 4 = 10.
Common wrong answers
- If you answered 7
- 7 is 3 + 4, dropping the 2.
- If you answered 9
- 9 comes from 2 + 3 + 4, adding instead of multiplying.
- If you answered 14
- 14 is 2(3 + 4), distributing wrongly.
More Advanced Math questions
- Easy
If f(x) = 3x − 7, what is the value of f(5)? - Easy
What are the solutions to x² − 9 = 0? - Easy
Which of the following expressions is equivalent to x² + 7x + 12 ? - Easy
The function g is defined by g(x) = x³ + 2x. What is the value of g(−2) ? - Easy
For x > 0, which of the following is equivalent to ∛(x⁵) ? - Easy
The function h is defined by h(x) = (x − 6)(x + 2). What is one value of x for which h(x) = 0 ?
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