M(x) = 3x^3–2x+4x^2–x+5 N(x) = 2x^2–x+3x^3–3x^2+9 a). Thu gọn các đa thức trên theo lũy thừa giảm dần của biến b). Tính M(x)+N(x) c). Tìm nghiệm của đa thức P(x)=M(x)+N(x)–6x^3–3x^2–2x

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

17 in long 1.3 ft wide and 8in high what is the volume

Carmen begins her next painting on a rectangular canvas that is 82.7 cm long and has a area of 8,137.68 cm2. will the painting fit in a frame with an opening that is 82.7 cm long and 95 cm wide? explain