The sum of 3 consecutive odd numbers is 51. what is the second number in this sequence?

a. s.a.!

34 cup. a serving of vegetable soup is 23 cup. the restaurant sold 20 servings of chicken noodle soup and 18 servings of vegetable soup. how many more cups of chicken noodle soup did they sell than cups of vegetable soup?

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).