Reasoning Simplify the expression (−12.9)+10.5. How are (−12.9)+10.5 and 12.9+(−10.5) related? Explain without computing. Using a property of operations, what can you say about their sum? please help

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

Which fraction is not equivalent to 8/12 a. 2/3 b. 24/36 c. 4/10 d. 6/10

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?