Advanced MathEasyConstant after subtracting a bracket
Advanced Math practice question
The expression 7 − (x − 2) simplifies to c − x, where c is a constant. What is the value of c?
Answer: 9
7 − (x − 2) = 7 − x + 2 = 9 − x.
Common wrong answers
- If you answered 5
- 5 subtracts 2 instead of adding it; the minus sign flips the −2.
- If you answered 7
- 7 ignores the −2 entirely.
- If you answered -9
- −9 has the sign wrong.
More Advanced Math questions
- Easy
If f(x) = 3x − 7, what is the value of f(5)? - Easy
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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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