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Questions and Answers
What is the value of $8^3 - 3^3$?
What is the value of $8^3 - 3^3$?
- 495
- 510
- 505 (correct)
- 512
If $x = 2$, what is the value of $2x^2 - 6x + 4$?
If $x = 2$, what is the value of $2x^2 - 6x + 4$?
- $12$
- $10$
- $8$ (correct)
- $16$
What is the result of $(-15) - (-7) + (-3)$?
What is the result of $(-15) - (-7) + (-3)$?
- $5$ (correct)
- $-5$
- $-15$
- $-25$
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Study Notes
Algebraic Expressions
- The value of $8^3 - 3^3$ can be calculated by following the order of operations (PEMDAS).
- Evaluating $x = 2$ in the expression $2x^2 - 6x + 4$ yields a specific value.
- The equation $(-15) - (-7) + (-3)$ involves the manipulation of negative integers.
Evaluating Expressions
- $8^3 - 3^3$ equals $512 - 27$, which equals $485$.
- $2x^2 - 6x + 4$ equals $2(2)^2 - 6(2) + 4$, which equals $8 - 12 + 4$, which equals $0$.
- $(-15) - (-7) + (-3)$ equals $-15 + 7 - 3$, which equals $-11$.
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