80 POINTS PLEASE HELP



Question 1

3y; y+y+y


What is the result if you evaluate each expression for y=2?


They are both 6.


They are both 5.


One is 5, and the other is 6.


One is 5, and the other is 8.



Question 3


2z+3z


Choose the equivalent expression.


6z


5z


1z


5(z+1)


Part 2


2z+3z


Evaluate the expression when z=7.


_____


Question 4

Consider the expressions 6x and 3(x+2).


Evaluate each expression for x=2. What can you say about the expressions and results?


The expressions are not equivalent, but the answers are the same when x=2.


The expressions are not equivalent, and the answers are different when x=2.


The expressions are equivalent, but the answers are different when x=2.


The expressions are equivalent, and the answers are the same when x=2.


Question 7


Select all the statements that are true.


___ 116b is equivalent to 16b.


___ 14b+13b is equivalent to 27b.


___ 13(b+7) is equivalent to 13b+73.


___ b+0.3+4b is equivalent to 5b+0.3.


Question 8

Select all the statements that explain why 7x+2x and 4x+5x both equal 18 when x=2.


___ Both expressions simplify to 9x when like terms are combined.


___ Both expressions simplify to 5x when like terms are combined.


___The expressions are equivalent, because 7x−2x=5x which is part of the second expression.


___ The expressions are equivalent, because when you combine like terms in each, the result is the same.


Question 10

Consider the expressions 2(x+2) and 2x+2.


Evaluate each expression for x=4. What can you say about the expressions and results?


The expressions are equivalent, but the answers are different when x=4.


The expressions are equivalent, and the answers are the same when x=4.


The expressions are not equivalent, but the answers are the same when x=4.


The expressions are not equivalent, and the answers are different when x=4.