Simplify nine square root of two minus three square root of seven-plus square root of eight minus the square root of twenty-eight.

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Describe the symmetry of the figure. identify lines of symmetry, if any. find the angle and the order of any rotational symmetry.