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Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

Which triangle congruence postulate or theorem justifies my claim that the steps i made using construction paper and scissors produce an isosceles triangle? was it sss, sas, asa, aas, or hl?

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.