Which of the following completes the square or creates a perfect square trinomial for x^2 -8x+__?

If f(x)=3 over x+2 - square root x-3 then f(7)=

Lucy is a dress maker. she sews \dfrac47 7 4 ? of a dress in \dfrac34 4 3 ? hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable.

The difference between the measures of two complementary angles is 14. find the measure of both angles.