if the submarine travels 518 kilometers in 14 hours, how many kilometers does the submarine travel in 1 hour

The approximate line of best fit for the given data points, y = −2x − 2, is shown on the graph.which is the residual value when x = –2? a)–2 b)–1 c)1 d)2

Can someone me with my math problem pls my teacher is on my back about this

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?