Can someone pls tell me what 3/7 times negative 9/5

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

Describe how making an ‘and’ compound sentence effects your solution set

What is the value of x enter your answer in the box (3x+50