10.8 + 42 4/5 would be D) 53 3/5.
D. None of these.
Equilateral is the only triangle that has all the sides that are equal to each other. Hope this helped you :)
Answer:
5x - 9
Step-by-step explanation:
2x -(-3x + 9)
2x + 3x - 9) DISTRIBUTE -1
5x - 9 COMBINE LIKE TERMS