Each house cost $10 I have 50 in stock if I sold 2 houses for the price of $7 how much have I earned so far

How do the graphs of y = 1/x and y=5/x+6 compare?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)