Why does an even number plus an odd number always equals an odd number?

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

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?

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76