In a bivariate data, the sum of square of difference between the ranks of observation
value of two variables s 30 and the rank
correlation coefficient is 9/11. Find the
number of pairs
=10

Lucy is a dress maker. she sews \dfrac47 7 4 of a dress in \dfrac34 4 3 hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable

In a column proof the right column states your reasons

The graph of f(x) = |x| is transformed to g(x) = |x + 11| - 7. on which interval is the function decreasing?