1. Determine whether the following is an expression.
y + • w
A) No B) Yes
2. Marcie gets paid $1.25 an hour to babysit her little brother. If she babysits for 3 hours, how much money do Marcie's parents owe her?
A) $3.75 B) $4.00 C) $3.50 D) $3.25
3. Evaluate b2 – 2bc + c2 if b = 3 and c = –2.
A) 1 B) 25 C) –7 D) 17
4. Multiply.
7x10 * 7x4
A) 49x40 B) 49x14 C) 14x40 D) 14x14
5. Which property of the real numbers is illustrated by the following statement?
7 • 3 = 3 • 7
A) Associative property of multiplication C) Commutative property of multiplication
B) Distributive property
6. Combine like terms.
5w + 5x – 9w
A) w + x B) 10w – 9x C) –4w + 5x D) wx
7. Which property of the real numbers is illustrated by the following statement?
19 + 11 = 11 + 19
A) Associative property of addition C) Commutative property of addition
B) Distributive property
8. Determine whether the following is an expression.
5 + z = x
A) No B) Yes
9. Add. 20 + (–8)
A) –12 B) –28 C) 12 D) 28
10. Add. 0 + (–5) + 13 + (–3)
11. Use the indicated property to write an expression that is equivalent to the following expression.
(7 + 11) + 2 (associative property of addition)
12. Find the median.
20 15 17 25 22
13. Write the following phrase using symbols.
m decreased by by 4
14. Write the following phrase using symbols. Use the variable x to represent the number.
A number divided by 10
15. A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter.
16. Use the properties of addition and multiplication to complete the statement.
(5 + 18) + 4 = 5 + ( ____ + 4)
17. If a 4.4-pound bag of dog food costs $3.52, what is the cost per pound?