The low point of the Japanese trench in the Pacific ocean is -10372. The low point of the Puerto Rico trench in the Atlantic ocean is 1,172 meters higher. What is the depth of the Puerto Rico trench?

Asilkworm winds its cocoon out of one long silk fiber. to make silk thread, 3 to 10 of these silk fibers are unwound from their cocoons and combined into aa single thread with a typical length of 300 yards. choose a reasonable number of silk fibers in a thread write an equation to find the total length of the silk fibersused in 300 yards of the thread

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

What number is 7 units left of -15?