What is another way you can express 12 tenths

Sanjay solved the equation below. which property did he use to determine that 7x+42=42 is equivalent to 7(x+6)=42 7x+42=42 7x=0 x=0

The graph represents f(x)=[x]+3. what is f(-2.2)?

The ordered pair (2,-5.2) is located in quadrant iv