When evaluating the expression $8x + y - 9$ for given values of $x$ and $y$, what is the correct first step?

Replace each variable with its given numerical value.

Subtract 9 from the value of y.

Perform all addition and subtraction from left to right.

Simplifying and Evaluating Variable Expressions Practice — Grade 9 math

1. Evaluate the expression $4x + 3y - 5$ for $x = 2$ and $y = 7$. The value of the expression is ___.
2. What is the value of the expression $10m - 3n + 6$ when $m = 5$ and $n = 4$?
- A. 44
- B. 32
- C. 68
- D. 20
3. Evaluate the expression $7p - 2p + 5$ given that $p = 6$. The result is ___.
4. When evaluating the expression $8x + y - 9$ for given values of $x$ and $y$, what is the correct first step?
- A. Replace each variable with its given numerical value.
- B. Add 8 to the value of x.
- C. Subtract 9 from the value of y.
- D. Perform all addition and subtraction from left to right.
5. Find the value of the expression $2a + 3b - c$ when $a = 8$, $b = 3$, and $c = 10$. The value is ___.
6. Evaluate the expression $-5a^2$ when $a = -3$. The value is ___.
7. Which expression has a greater value when $c=2$ and $d=5$?
- A. $(cd)^2$
- B. $cd^2$
- C. The expressions are equal
- D. It cannot be determined
8. Evaluate the expression $3(1 + \frac{n}{p})^2$ for $n=10$ and $p=-2$. The result is ___.
9. Evaluate the expression $-p^3q$ for $p=-2$ and $q=5$.
- A. 40
- B. -40
- C. 30
- D. -30
10. Evaluate $|x^2 - y^3|$ for $x=-4$ and $y=-3$. The value is ___.