Question 1 In the expression -2z - 7, the coefficient is .

Blank 1: Question 2 In the expression 6x + 10, the variable is .

Blank 1: Question 3 In the expression -5y + 2, the constant is .

Blank 1: No. 4-11:

Determine whether the given terms are like terms.

Question 4 2x and -2x

a Yes

b No

Question 5 5b and 5c

a Yes

b No

Question 6 4y and 5xy

a Yes

b No

Question 7 x2y and xy2

a Yes

b No

Question 8 2mn and 4mn

a Yes

b No

Question 9 -6xy3 and -7xy3

a Yes

b No

Question 10 5 and 7

a Yes

b No

Question 11 3xy and 3xz

a Yes

b No

No. 9-19:

Simplify each of the following expressions by combining like terms.

If the expression is already simplified, choose "simplified."

Question 12 Simplify: 10b - 3b - n - 7

a 13b - n - 7

b 10b - 4n -7

c -n

d 7b - n - 7

e Simplified

Question 13 Simplify: 2x + 5 + x

a 3x + 5

b 7x + x

c Simplified

d 2x + x + 5

e 7x + 5

Question 14 Simplify: 4b - b + 3

a Simplified

b 3b + 3

c 5b - 3

d 5b + 3

e 4b - 4

Question 15 Simplify: 7x + 2y + 9x + 8

a Simplified

b 9xy + 9x + 8

c 16x + 10y

d 16x + 2y + 8

e 18xy + 8

Question 16 Simplify: 6n - n + 3 - 1

a 5n + 2

b 7n - 2

c 7n + 2

d Simplified

e 5n - 2

Question 17 Simplify: 5a + 4b - 5c + 6a + 9b

a Simplified

b 11a + 13b - 6c

c 11a + 13b - 5c

d 11a + 12b - 5c

e 12a + 13b - 5c

Question 18 Simplify: 12x - 15y - 18x + 17y + 20x

a 15x + 2y

b 14x + 2y

c Simplified

d 14x + y

e 14x + 3y

Question 19 Simplify: 20x - 2xy2 + 3x - 13xy2

a 23x - 16xy2

b 23x + 15xy2

c Simplified

d 22x - 15xy2

e 23x - 15xy2

Question 20 Simplify: 10x + 3y - 3z + 4y - 2x + 5z

Your answer: