Answer:
1). 8r + 7t
2). -48r² - 128rt + 20t²
3). 8r + 8t
NOTE: These are the most simplified form of each equation given, these might or might not me given in the answer choices, however these are correct.
Step-by-step explanation:
You just have to combine the similar values for each equation.
Hope this helps, good luck!
