If you have answer choices that would be helpful.
If not I would assume that it means that giving every student the same test is an example of a controlled variable.
Answer:
x = 29
Step-by-step explanation:
-58 - 7x = -10x + 29
-58 + 3x = 29
3x = 87
x = 29
Answer:

Step-by-step explanation:

Answer:
After 25 minutes
Step-by-step explanation:
The answer is C
Answer:
A
Step-by-step explanation:
Because if you simplify you get that