Expressions and Equations Standards

Emma is planning a party and needs to buy some party candies. She has $25 to spend. Each candy costs $5, and she wants to buy n candies. Write an algebraic number to represent the amount of money Emma has after buying the candies. Is this an expression or an equation?

• It's an Expression
  25 - 5n

• It's an Equation
  25 = 5n

• It's an Equation
  25 - 5n = 0

• It's an Expression
  5n

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

You have an algebraic number that represents the total amount of money you will have after saving $15 each week, starting with $50. The number is 50 + 15w. Identify if this is an expression or equation and solve for the total amount of money if w = 4 weeks.

• Expression
  Total amount: $110

• Equation
  Total amount: $110

• Expression
  Total amount: $200

• Equation
  Total amount: $200

A rectangle's area is given by the algebraic number of 6w², where w is the width. Identify if this is an expression or equation and find the area if the width w = 2.

• Expression
  Area: 24 square units

• Equation
  Area: 24 square units

• Expression
  Area: 12 square units

• Equation
  Area: 12 square units

Solve the algebraic number of 2 x (y² - 1) = 6. Is this an expression or an equation?

• Expression
  y = 2

• Equation
  y = 2

• Expression
  y = 1

• Equation
  y = 1

3x − 5y

• Expression

• Equation

6y − 2z

• Expression

• Equation

Solve:
7x - 3x - 8 = 24

• 8

• -8

• 3.2

• 4

What is the simplified form of this expression
3x+4+5x+3

• 15x

• 8x+7

• 7x+8

Add these expressions
(3x+15) + (4x+13)

• 7x+ 28

• 35x

• x+2