5 x - 3 = 27 , x=___ 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?

In what organelle does photosynthesis take place?

Hi, can anyone show me how to do this problem? 100 points for this. in advance