PLS HELP ME

What is the answer to |-2x-5|-|-4+8| and x=7

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?