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Due to COVID-19 disruptions, I do not have book inventory on hand. Purchase access to the Math Guide Online below or purchase physical books through Amazon (here and here). Stay safe out there.

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In the systems of equations above, c and d are constants…

y=c(x^2) + d 2y=10 In the systems of equations above, c and d are constants . For which of the following values of c and does the system of equations have no real solutions? A) c=-6, d=6 B) c=-5, d=4 C) c=6, d=4 D) c=6, d=5 Please help, thank you.

The Math Guide is (basically) back in stock at Amazon

At long last, and just in time for the summer prep rush, the Math Guide is back to showing “usually ships in 1-2 days” at Amazon. (UPDATE 5/30/2020: now it’s all the way back in stock!) I still don’t have stock to ship myself, so if you want a physical book you have to go (more…)