Math Review with Expressions and Equations

One difference between equations and expressions would be...

• you solve both of them using inverse operations.

• you flip the symbol when you multiply or divide by a negative

• equations have an equals because they show two equal expressions. Expresions have terms and operations.

Choose an expression that is equivalent to the following
6n + 2(3 - 5n)

• n + 6

• 6 - 4n

• 16n + 6

Choose the first step in solving the following equation.
-3y - 12 = 14

• add 3 from both sides

• add 12 to both sides

• subtract 12 from both sides

0.1( x - 20 ) > 2

• x > 40

• x < 40

• x > 220

Given an equilateral triangle with a side length of 4 + 2y. Find the perimeter.

• (4 + 2y)/ 3

• 4/3  +2y/3

• 3(4 + 2y)

-12x > 36

• x > -3

• x > 48

• x < -3

- 3( 4 - 2x) = 6

• x = 1

• x = -3 

• x = 3

x + x + x + x

• x⁴

• x

• 4x

• x₄

A student has a test where the sum of her math and science scores is 180 points. If the math score is m and the science score is s, write an algebraic number that represents this situation. Is this an expression or an equation?

• It's an Expression
  m + s

• It's an Equation
  m + s = 180

• It's an Expression
  m + s + 180

• It's an Expression
  180 − m − s

4a + 7b = 28

• Expression

• Equation