15041.A.1B.2C.-1D.02.A.B.C.D.3.A.B.C.D.4.2816xA.281-2x=16B.16(12x)28C.28(1x)216D.16(1x)2285.68A.36B.30C.24D.206.a1aaa+1aA.B.C.D.7.y=x-12+313A.B.C.D.8.yx23xmmx(10)xx23xm0A.x11x21B.x11x22C.x11x20D.x11x239.A.B.C.D.10.ABBCA0B1C2A.B.1C.D.0(4)11.x2-2x=0________.12.:20172017201720172017201713.y=2x+42.14.ABCDA(m,n)B(2,-1)C(-m,-n)D15.32cm______cm216.x17.818.8x19.8ABCDEBDABECBE20.8x.12y3x21.81______90______222.10xyx-4-3-2-10123456y2415830-103815(1)x=6y2x34st024st23.101kmkm/h2B3225km24.12.xOyPxyQxyy=QP1352Py=x2QPP3MmnNy=2x20m2MN25.14ABCDAB=16BC=8ADEAE=3FABEFEFMNNCDMABCDAF=xBFMS1EFMNx2Sx3SSM1~10CACCDDDBDC11.0212.013.y=2x14.-2,115.6416.1m317.22x,22x2118.M519.20.21.2223.24.25..