Please help!

(12-4) exponet 2 x 3 - 16 ➗ 4 =
A)440
B)764
C)44
D)188

Lorne subtracted 6x3 – 2x + 3 from –3x3 + 5x2 + 4x – 7. use the drop-down menus to identify the steps lorne used to find the difference.

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

What is the solution for 6 - 7/8? explain the steps.