Ocean waves are hitting a beach with a frequency of 0.100 Hz. Their average wavelength is 15.0 m. What is their average speed?

Choose the equation that represents the graph below: (1 point) graph of a line passing through points negative 3 comma 0 and 0 comma 3 y = x − 3 y = −x + 3 y = −x − 3 y = x + 3 will award !

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Determine which postulate or theorem can be used to prove that lmn =nmo