Sally pays $38 per hour for dance class after paying the enrollment fee of $100. identify the constant of proportionality that relates her dance class charges (y) to the number of hours (x) she goes to class.
a) x
b) y
c) $38
d) $138

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing

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