80 points

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.

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.