Given the data set X with three input features and one output feature representing the classifi cation of samples, X: I 1 I 2 I 3 O 2.5 1.6 5.9 0 7.2 4.3 2.1 1 3.4 5.8 1.6 1 5.6 3.6 6.8 0 4.8 7.2 3.1 1 8.1 4.9 8.3 0 6.3 4.8 2.4 1 (a) Rank the features using a comparison of means and variances. (b) Rank the features using Relief algorithm. Use all samples for the algorithm (m

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?

What number is 7 units left of -15?

Y+ 2/y is it a polynomial in one variable or not? and if so, why?