1.1 Assignment "Variables and Expressions"

For 3x^2- 4x+ 1, match the following: 1. x 2. 3 3. 1 4. 3x^2-4x+ 1 5. 2

1. Variable 2. Coefficient 3. Constant 4. Algebraic Expression 5. Degree

If x is 5, then 6x = _____.

30

five minus n

5 - n

eight minus x

8 - x

The coefficient of 9(14)P is _____. a. 9 b. 14 c. 126

c. 126

The coefficient of 8 • 2N is _____. a. 8 b. 2 c. 16

c. 16

variable

a letter or symbol used to represent an unknown

algebraic expression

a mathematical expression containing one or more variables

expression

a mathematical phrase that cannot be determined true or false

constant

a numerical value

Which of the following expressions represents "twelve diminished by six times a number"? a. 12 - 6n b. 6n - 12 c. 12n - 6

a. 12 - 6n

The coefficient of 2(3)(6)Q is _____. a. 36 b. 18 c. 12

a. 36

Which of the following expressions represents "the quotient of nine times a number and seven"? a. 9n ÷ 7 b. 9n - 7 c. 9(n + 7)

a. 9n ÷ 7

Look at each expression. Is it equivalent to "the quotient of 10 plus x and y minus 3"? a. (10+x)/(y) b. (10+x)/(y-3) c. 10+(x)/(y)-3 d. (10+x-3)/(y)

a. no b. yes c. no d. no

Which of the following expressions represents "three times the difference between t and y"? a. y - 3t b. 3t - y c. 3(t - y)

c. 3(t-y)

Which expression does not represent "the sum of n and 6"? a. 6 + n b. n + 6 c. 6n

c. 6n

The coefficient of 6x is _____. a. 1 b. 6 c. x

b. 6

Which of the following expressions represents "the difference of 8 and n"? a. n - 8 b. 8 - n c. -8n

b. 8 - n

Which of the following expressions represents "the sum of n and the sum of 8 and 6"? a. (n + 6)8 b. n + (8 + 6) c. n(8 + 6)

b. n + (8 + 6)

Which of the following expressions does not represent "four more than one-third x"? a. 1/3x + 4 b. x/3+ 4 c. 1/4x + 3

c. 1/4x + 3

the sum of n and five

n + 5

five subtracted from n

n - 5

coefficient

the constant preceding the variables in a product

x added to the sum of five and seven

x + (5 + 7)

the difference of eight and two, added to x

x + (8 - 2)

eight added to x

x + 8

the sum of x and itself

x + x

the sum of eight and two, subtracted from x

x - (8 + 2)

eight subtracted from x

x - 8