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The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

If you double the input of a function and it results in half the output, and if you triple the input and it results in a third of the output, what can be guessed about the function? check all that apply.

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer