Description of the cap rock of mesa and buttes​

Which of the following expressions is equivalent to -1/4y - 2 1/4 + 1/2 (4-2y)? a. -3y + 2b. -3 1/2+4c. -4 1/2y+2d. -4 1/2y+2show ur work

Which type of seismic waves are confined at the surface

The oil and gas found in the middle east are regulated by a. organization of petroleum exporting countries b. southwestern asian oil refineries c. north atlantic treaty organization