Basic Expressions With Variables

Which of the following expressions contains a variable?

• 7+3

• 144÷12

• 7 + 15n

• 6(5)

Find the coefficient in the algebraic expression.

• x

• 4

• 5

• 9

What is the sum of 14 and x?

• x - 14

• 14(x)

• 14 + x

• 14/x

What is a number decreased by seventeen?

• n + 17

• n - 17

• 17 + n

• 17 - n

a symbol for an unknown value; usually a letter (such as a, x, or y) is the symbol used

• constant

• variable

• coefficient

• term

u decreased by 17

• 17 - u

• u - 17

• u + 17

• u ÷ 17

Which expression shows the sum of 12 and x?

• 12x

• 12-x

• 12+x

Which phrase describes this expression 16-y

• The quotient of 16 and y

• y added to 16

• the product of 16 and y

• y less than 16

Identify a constant in the expression
3x + 2y + 7

• 3

• 2y

• 7

• 2

How many terms are in the expression
3x + 2y + z

• 5

• 2

• 4

• 3