A mix of factoring by grouping. Factor the exressions. 17ax+17a-x-1 Please explain/show steps on how to do this! *edit: I know the answer to the problem because it was said aloud in a class, but I am not sure the steps to get there!

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

What is always true about a positive integer raised to a negative odd power?