Is this correct? (checking answer(s) )

Given abcd ac=38 and ae=3x+4 find the value of x

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!

When you dilate a figure with a scale factor of 1/2, what will the dilated figure look like?                                                                                           a: the dilated figure will have side lengths that are half the length of the original side lengths.                                                                          b: the angles in the dilated figure will be half the measure of the original figure.                                                                                c: the dilated figure will have side lengths twice the length of the original.