Is this correct for number 5 if not please help

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?

What is the inverse of the function f(x) = 2x + 1?

X-10/4 when x = –18 a 7 b –2 c –7 d 2