HELP mE

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

Solve the system of equations. 2x-2y=-4 and x+y=8. show work

1/4x+5=3/4. i can't get access to the answer to this question! and, my request on "contact us" will not go