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