Find the coordinates of the other endpoint of the? segment, given its midpoint and one endpoint.? (hint: let? (x, y) be the unknown endpoint. apply the midpoint? formula, and solve the two equations for x and? y.) midpoint ? ( negative 11 ? 11? , 18 endpoint ? ( negative 5 ? 5? , 10 10? )

#12 find the value of x. #13 find the value of the variable.

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?