Expressions Pretest/Post Test

Which expression is equivalent to 3x?
1. 8x - 5x + 9
2. 4 - 7x + 10x - 4
3. 10 + 3x + 3x - 3x
4. 7x + 6 - 3
Select all of the expressions that are equivalent to 8x + 10
1. 5x + 7 + 3x + 3
2. 4x + 3x + 10
3. 5 + 5 + 5x + 5x
4. 10x + 9 - 2x
What is the correct way to check equivalent expression by inserting a number into 2x + 4?
1. Pick 0 or 1, substitute in for x and solve
2. Pick two numbers and add it into the expression
3. Pick two numbers, substitute in and check to see if the numbers are the same
4. Pick two numbers and divide the expression by them
Simplify the expression 2x + 26 + 3x + 50
1. 6x + 75
2. 5x + 76
3. 76 + 2x + 3x
4. 65 + 10x
What is the correct way to use a table to check to see if 4x + 3 is equivalent to 2x + 2x + 3?
1. Make a table of x and y values. Plug in numbers and if the values go up at a constant rate, the expressions are equivalent.
2. Make a table of x and y values. If the number is same for each value, then the expression is equivalent.
3. Make a table of x and y values. If the values decrease then the expressions are equivalent.
4. Make a table of x and y values. If the second differences of the y values are constant then the expressions are equivalent.