What is the least common multiple of 5, 10 and 15?

The graph of f(x)=|x| is reflected over the y-axis and horizontally compressed by a factor of 1/9. write a formula for function g(x)

A20? -foot ladder is placed against a vertical wall of a? building, with the bottom of the ladder standing on level ground 19 feet from the base of the building. how high up the wall does the ladder? reach?

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .