Which property would you use to solve the following equation?

-2m = -18

Apossible wavelength for the color blue is 0.000000492 meter. which of the following is a reasonable estimate for this wavelength for the color blue? a. 5 × 10-6 m b. 5 × 107 m c. 5 × 10-7 m d. 5 × 106 m

Ratio of circumference to diameter example plz i need to now what it looks like.

To prove a polygon is a rectangle, which of the properties listed must be included in the proof?