Find the circumference of a pizza with a diameter of 22 inches

Jayda's house is located at (1, 5). she can walk in a straight line to get to cristian's house. a fast-food restaurant is located at (11, 0) and partitions the way from jayda's house to cristian's house by a ratio of 5: 1. find the coordinate of cristian's house. me . im a little stuck

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

Given abcd ac=38 and ae=3x+4 find the value of x