1. **Evaluate:** $3 \times (4 + 5) - 6$
2. **Evaluate:** $8 + 2^3 \times 2$
3. **Write an expression:** "Seven more than three times a number $n$"
4. **Evaluate:** $3n + 5$ when $n=4$
5. **True or false:** Does $x=2$ make $4x + 1 = 9$ true?
6. **True or false:** Does $m=-1$ make $5 - 2m = 7$ true?
7. **Equivalent expression:** $2(3y + 4)$ using distributive property
8. **Identify parts:** In $6a + 12$, find coefficient, variable term, constant
9. **Evaluate:** $2^4 + 3^2$
10. **Write and evaluate:** Total cost when $t=6$ for tickets bought by friends
11. **True/False:** Are $y + y + y$ and $3y$ equivalent?
12. **Create and evaluate:** Expression for "product of 7 and $p$ decreased by 9" and evaluate at $p=3$
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1. Evaluate $3 \times (4 + 5) - 6$:
$$3 \times (4 + 5) - 6 = 3 \times 9 - 6 = 27 - 6 = 21$$
2. Evaluate $8 + 2^3 \times 2$:
First, calculate exponent:
$$2^3 = 8$$
Then multiply:
$$8 \times 2 = 16$$
Finally add:
$$8 + 16 = 24$$
3. Expression for "Seven more than three times a number $n$":
$$3n + 7$$
4. Evaluate $3n + 5$ when $n=4$:
$$3 \times 4 + 5 = 12 + 5 = 17$$
5. Check if $x=2$ makes $4x + 1 = 9$ true:
Left side:
$$4 \times 2 + 1 = 8 + 1 = 9$$
Right side is 9, so equation is true.
6. Check if $m=-1$ makes $5 - 2m = 7$ true:
Substitute:
$$5 - 2 \times (-1) = 5 + 2 = 7$$
Right side is 7, so equation is true.
7. Equivalent expression to $2(3y + 4)$ using distributive property:
$$2 \times 3y + 2 \times 4 = 6y + 8$$
8. In $6a + 12$:
- Coefficient: $6$
- Variable term: $6a$
- Constant: $12$
9. Evaluate $2^4 + 3^2$:
$$2^4 = 16$$
$$3^2 = 9$$
Sum:
$$16 + 9 = 25$$
10. Total tickets bought:
Two friends each buy 3 tickets: $2 \times 3 = 6$
One friend buys 2 extra tickets: $2$
Total tickets:
$$6 + 2 = 8$$
Total cost when $t=6$:
$$8 \times 6 = 48$$
11. Are $y + y + y$ and $3y$ equivalent?
Yes, because $y + y + y = 3y$ by definition of multiplication as repeated addition.
12. Expression for "product of 7 and $p$ decreased by 9":
$$7p - 9$$
Evaluate at $p=3$:
$$7 \times 3 - 9 = 21 - 9 = 12$$
Evaluating Expressions 825C64
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