First off, if it's mixed, you'd want to convert it to "improper" first, and then do the division... say hmm - 3 and 1/7

the line over the decimal part is because is a "recurrent decimal", or repeating one.
Answer:
7c^2d-7c+4d-10
Step-by-step explanation:
Start off with the term that has c^2 in it. 5c^2d + 2C = 7c^2d, then since you have multiple choice, the d value differs between the two answer choices that have 7c^2d so you can do +3d +d to get +4d to get the fourth answer choice.
To check your work, you can add/subtract each term to see if you get 7c^2d-7c+4d-10
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Answer:
The dependent variable is the level of aggressiveness.
Step-by-step explanation:
This is a case were researchers exposed children to 2 hours of Tv with violence of without violence. The researchers what to know the level of aggressiveness. Analyzing the information you can see that the amount of time (each day per one moth during 2 hours) on the Tv and the violence or not violence exposition are controlled by the researchers so these ones are the independent variables. And the level of aggressiveness is the dependent variable because this one depend on the amount of time and kind of Tv program.