Sarah used properties of operations to write the following three equivalent expressions to 1l-4+8+(-6)]. Expression 1: 3 (-4)+ +2(-6)

Expression 2: 1[(-4+(-6)]+4

Expression 3: -2+4+3
Which of the expressions is not equivalent and what was Sarah's error?

The scatter plot shows the number of animal cells clara examined in a laboratory in different months: plot ordered pairs 1, 20 and 2, 60 and 3,100 and 4, 140 and 5, 180 what is the approximate predicted number of animal cells clara examined in the 9th month?