What is the correct way to arrange the altitudes in decreasing order 13,58,-51,-35

What properties allow transformation to be used as a problem solving tool

Describe a pattern in each sequence what are the next two terms of each sequence -5, 5, -5, 5 a. subtract 10 from the previous term; -5,5 b. multiply the previous term by 1; 5, 5 c. add 10 to the previous term; -5, -15 d. multiply the previous term by -1; -5, 5

If a=0.333333 and b=0.55555, what is the value of a+b