I need this one question done for a test, can anyone help me out please

1/4x+5=3/4. i can't get access to the answer to this question! and, my request on "contact us" will not go

What is the missing justification in the proof of the pythagorean identity below, sin^2x+cos^2x=1, using a right triangle?

Jane evaluates x^2-3x+5 for x=2 below. step 1: (-2)^2-()+5 step 2: =-4+6+5 step 3: =7 what, if any, was jane’s mistake? a)jane made no mistakes. b)jane incorrectly evaluated(-2)^2 in step 2. c)jane incorrectly added the terms in step 3. d)jane incorrectly substituted in x=-2in step 1.