G 2. (15 pt) Let X be a set with an equivalence relation ∼. Recall that, for an element x ∈ X, the equivalence class of x is the set [x] := {y ∈ X | x ∼ y} . a) Write down the precise definition of an equivalence relation. b) Using only this definition and the definition of equivalence class above, prove that for two elements s, t ∈ X, [s] = [t] if and only if s ∼ t.

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

i can you with this answer

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answer: it actually depends on which is the independent variable and which is the dependent variable. let us say we're looking at a linear equation. y=2x+3. we theoretically could switch the equation to be x=(y-3)/2 and it would be the same line. so either a causes b or it can be that b causes a. so technically the answer is false

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