Perform the operations and write the answer in simplest form 3/5 * 9/10

Im literally having a mental breakdown

Deepak plotted these points on the number line. point a: –0.3 point b: – 3 4 point c: – 11 4 point d: –0.7 which point did he plot incorrectly?

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18