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 + 6)(x - 3)
Step-by-step explanation:
I think its 149/ 490. Not sure, but pretty confident. Hope this helps.
Answer:
25
Step-by-step explanation:
2kxxndesxnvvvhhvhhh
The first digit can be any one of the four. For each of those . . .
The second digit can be any one of the remaining 3 .
The total number of possible arrangements is (4 x 3) = 12 .
