You just have to reflect it over the blue line, so if one point is 2 squares from the blue line then you will make it 2 squares away on the other side of the blue line. The y point will stay the same so they will be the same height
357 centimeters would be your answer, this is because:
21*17=357cm
I hope this helps.
Answer: the second one
Step-by-step explanation:
5x-3x=-6
2x=-6
x=-3
x equals -3 is the answer.