What property is shown by the equation?

column a

column b

abc

1.

(34 + 11) + 9 = (11 + 34) + 9

abc

2.

25 + (–15 + 4) = (25 + (–15)) + 4

abc

3.

–(–21 + 8) = 21 + (–8)

abc

4.

–30 + (–16) = –16 + (–30)

a.

commutative property

b.

associative property

c.

opposite of a sum property

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74