Expressions and Variables in Algebra

The video tutorial explains how to translate tables into algebraic expressions by using variables to represent unknown numbers. It covers various operations such as addition, subtraction, multiplication, and division applied to different scenarios like length, cost, quantity, time, and distance. The tutorial emphasizes understanding the meaning of terms like 'sum', 'difference', 'twice', and 'triple' in the context of algebraic expressions.

What variable is used to represent an unknown number in the first section?

• n

• x

• z

• y

Tags

CCSS.6.EE.A.2A

How do you express twice the sum of a number and three?

• n + 3

• 2(n + 3)

• n + 6

• 2n + 3

Tags

CCSS.6.EE.A.2A

What is the expression for double the length?

• l/2

• l + 2

• 2l

• l - 2

Tags

CCSS.6.EE.A.2A

How do you express double the length decreased by six?

• 2l + 6

• l - 6

• 2l - 6

• l + 6

Tags

CCSS.6.EE.B.6

What variable is used to represent cost?

• c

• k

• m

• p

Tags

CCSS.6.EE.A.2A

How do you express two times the difference of the cost and twenty?

• c + 20

• 2(c - 20)

• c - 40

• 2c - 20

Tags

CCSS.6.EE.A.2A

What is the expression for the difference of five and a quantity divided by two?

• q - 5/2

• 5 - q/2

• (5 - q)/2

• 5/(q - 2)

Tags

CCSS.8.EE.B.5

What variable is used to represent time?

• t

• s

• r

• q

Tags

CCSS.6.EE.A.2A

How do you express triple the amount of time increased by five?

• 3t + 5

• t + 15

• t + 5

• 3(t + 5)

Tags

CCSS.6.EE.A.2A

What is the expression for the sum of negative four and twice the distance?

• -4d + 2

• 2d - 4

• d - 4

• -4 + 2d

Tags

CCSS.6.EE.A.2A