Expressions and Age Relationships

This video tutorial teaches how to derive algebraic equations and expressions from sentences. It covers converting word problems into algebraic expressions, such as calculating costs and ages using variables. The tutorial includes examples like calculating the cost of cups and tickets, and determining ages based on given conditions. Viewers are encouraged to practice by pausing the video and solving problems. The video concludes with a preview of future topics on deriving formulae for areas and volumes.

What is the algebraic expression for 'c minus five'?

• 5 - c

• c + 5

• c - 5

• 5 + c

Tags

CCSS.6.EE.C.9

If one cup costs $2.20, how would you express the cost of x cups?

• 2.20x

• x - 2.20

• x/2.20

• 2.20 + x

Tags

CCSS.HSA-SSE.A.1A

How would you write the expression for the total cost of x adult tickets at £12 each?

• 12x

• x/12

• x - 12

• 12 + x

Tags

CCSS.6.EE.B.6

What is the expression for the total cost of x adult tickets and y child tickets if child tickets cost £8 each?

• 8x - 12y

• 12x + 8y

• 8x + 12y

• 12y + 8x

Tags

CCSS.6.EE.B.6

If David is Andrew's age plus eight years, how would you express David's age in terms of x?

• x/8

• 8x

• x + 8

• x - 8

Tags

CCSS.6.EE.B.6

Jane's age is twice Andrew's age. How would you write Jane's age in terms of x?

• x - 2

• 2x

• x/2

• x + 2

Tags

CCSS.6.EE.B.7

If the total of Andrew, David, and Jane's ages is 88, what is Andrew's age?

• 88

• 28

• 40

• 20

Tags

CCSS.7.EE.B.4A

What is the first step in solving an equation derived from multiple statements?

• Write each statement as an expression

• Add all numbers

• Guess the answer

• Subtract all numbers

Tags

CCSS.6.EE.A.2C

What should you do after writing each statement into an expression?

• Multiply all expressions

• Ignore the expressions

• Divide all expressions

• Solve the equation

Tags

CCSS.6.EE.A.2C

What future topic is hinted at in the video?

• Deriving formulae for area and volumes

• Calculating interest rates

• Understanding geometry

• Learning calculus

Tags

CCSS.8.EE.C.7B