Identify Expressions and Equations

Which phrase describes the expression?

• The product of a number and n

• a number n decreased by 10

• the sum of a number n and 10

• a number n times 10

5x + 7 is an:

• Expression

• Equation

• Inquality

4y - 7 = 21

• Expression

• Equation

• Inequality

17-10=7

• Expression

• Equation

• Inequality

a - b

• This is an algebraic expression.

• This is an algebraic equation.

5n

• This is an algebraic expression.

• This is an algebraic equation.

c = 10m

• This is an algebraic expression.

• This is an algebraic equation.

p = 100 - d

• This is an algebraic expression.

• This is an algebraic equation.

One way to estimate your distance (in miles) from a lightning strike is to count the number of seconds between the flash of the lightning and the sound of thunder, then divide by 5. Translate this verbal model into an equation.

• d = s ÷ 5

• s ÷ 5

• d = 5 ÷ s

What is 12 ⋅ 12 ⋅  12 ⋅ 12 written as a exponent

• 12⁴

• 12  ⋅  4

• 4¹²