Expand the following logarithms:log(\frac{\sqrt{(x-1)(2x +1)^2} }{(x^2-9)} )

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

Ineed to know the answer to this algebra question.

Aladder that is 20ft long is leaning against the side of a building. if the angle formed between the ladder and the ground is 75 degrees how far is the bottom of the from the base of the building?