It is 77.5. Using a calculator is more useful. ☺
Answer:

Step-by-step explanation:
1. Make fraction to decimal

2. Order from least to greatest.
1.7 > -2 > -2.5
Least to greatest : 
5x7=35
5x7=5x(5+2)
5x7=(5x3)+(5x4)
5x7=20+15
5x7=35
This is how I would do it :)
Answer:
49b^2 -36 = (7b -6)(7b +6)
so because there you missed some signs in these wrote choices
hope helped
Step-by-step explanation: