Find 2x2  − 2z4  + y2  − x2  + z4  if x = −4, y = 3, and z = 2.

Determine the quotient and remainder when (6a3)+11a2-4a-9) is divided by (3a-2) express your answer in the form q(a) + r(a)/d(a)

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

1. are the triangles similar and if so why? what is the value of x? show your work.