Today's lesson continues with simultaneous inequalities. Like yesterday, let's try expressing them as regions of x and y.
Literal
Today [attributive-の] lesson [topic-は] simultaneous-inequalities [attributive-の] continuation is-[polite-です]. Yesterday [same-as-と同じく] x [and-と] y [as-に-する] region [at-で] represent-[try-てみ][volitional-ましょう].
Math class. 連立不等式 ('simultaneous/system of inequalities') is a high-school math term. ~と同じく ('same as, just like') is a formal adverbial phrase. 領域 ('region, domain, area') is used in math for 2D regions in the coordinate plane. The lesson continues from the previous day — typical of structured math education.