Find 47.5% of 690 (remember this is a non calculator question)

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

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

Write the percent as a fraction or mixed number in simplest form. 0.8%