Answer:
all work is shown and pictured
3 is the answer. 3 X 3 = 9
I'm glad I could help
3/5 is the same as 12/20 which is not red over total
Answer:
step one needs to be fixed... you are supposed to subtract 10 from both sides of the equation.
Step-by-step explanation:
STEP 1: Move all terms not containing n to the right side of the equation.

STEP 2: Divide each term by 2 and simplify.

The first one (top left) is a function. Use the vertical line test, if a vertical line crosses the line drawn on the graph twice, then it's not a function.