Determine if the graph of the function is concave up or concave down.
1. f(x) = -4x^2 -2x -8

2. y = 2(x+5)^2 +5

3. y = -1/5 (x+1)^2 -1

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true

step by step explanation: when u removing the parentheses and combined them that would be : x+3y-x-y=2y

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