Anumber is decreased by seven. then, the new number is multiplied by 3 to get an answer of -9.

what is the original number?

-30
30
4
-4

Captain umaima has a ship, the h.m.s. khan. the ship is two furlongs from the dread pirate nadia and her merciless band of thieves. the captain has probability 3/7 of hitting the pirate ship. the pirate only has one good eye, so she hits the captain's ship with probability 2/5. if both fire their cannons at the same time, what is the probability that the captain hits the pirate ship, but the pirate misses.

Tasha cut a fruit bar into 3 equal parts. she ate 1 part. what fraction of the fruit bar did tasha eat

2. show that isometries of euclidean spaces preserve derivatives of vector fields.