Identifying Equivalent Mathematical Expressions with Variables

Which expression equivalent to  b x 45 + b x 25
*Hint combine all the like terms!!!* 

• bx(45+25)

• b+(45+25)

• b+(45x b)+25

Are the expressions 10b -2b and  2(5b - 1) equivalent?
*Hint-  use the distributive property to see if the second expression when factored out is the same as the first one*

• yes

• no

Which of the following expressions is equivalent to
    2k+10 + 15k

• 27k

• 15k+2k+10

• 17k-10

Is 3(3s+2s)= 15s

• yes

• no

Mrs. Smith writes four expressions on the board. Which expressions are equivalent to each other? Expression​ ​ ​ (a)   and Expression ​ (b)  

• II

• I

• III

• IV

Mrs. Smith writes four expressions on the board. Which expressions are equivalent to each other? Expression​ ​ ​ (a)   and Expression ​ (b)  

• II

• I

• III

• IV

Mrs. Smith writes four expressions on the board. Which expressions are equivalent to each other?

• II

• I

• III

• IV

Select one answer.

Which of the following expressions is equivalent to 6n + 12 ?

• -6n - 8 -6n + 4

• -5n + 2 - 6n + 4

• 5n + 9 + n + 3

• 6n + 9 + 6n - 3

Which is equivalent?

• ¼(x)

• 4x

• Neither