Simplify the expression
7r^3 (r^-2)^2 / 20(r^4)^-5

Rewrite the hyperbolic equation 4y^2 -9x^2 +54x-8y-113=0

Which rational number could be graphed between -4 and -5

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?