Kelly solved the equation below using the steps shown. Given:
3(x-4) - 4= 1
Step 1:
Step 2:
Step 3:
Step 4:
3x - 12-4=1
3x - 16=1
3r=-15
x= -5
Which step contains Kelly's first mistake?
Your answer

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample