How do I solve 4a-3=2a+7

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

Find the slope of the line passing through a pair of points

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.