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How to solve the following expression algebraically: (x+y)^-2 = x^-2(1+y/x)^-2 Thanks ahead? Change the ratio in the simplest form:
(1) 12:13.2
(2) 33 1/3:100
(3) 4.5:3
(4) 2.5:6.5:8? Could anyone help me solve this equation 11^(n-8 ) − 5 = 54? Thank you!!? What's something that every single thing on earth has in common? A,b>1 prove, a^2/(b-1)+b^2/(a-1)≥8?