The width of a rectangle is 8x-3.5 feet and the length is 3.5x+7 feet Find the perimeter of the rectangle.

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

Rewrite so the subject can be y in the formula d=m-y/y+n

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1