ESTIMATE the value of y when x=2.5

For which pair of functions is (gof)(a)=|a|-2?

If the discriminant if a quadratic equation is 4 which statement describes the roots?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?