山东省菏泽市单县2021-2022学年八年级下学期期末数学试题

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14N¬=30,÷øx=30SḄ.7<ᵬÑÒÓ⊟ÕÖÜ30ᐗ/ÛÏÑÒÓ⊟ÕÖÜ24ᐗ/Û.(2)<ᑭòyᐗàÖᵬÑÒÓ⊟ÕùÛᑣàÖÏÑÒÓ⊟Õ(120-zn)Ûᵫ⚪\N30m+24(120-m)<3120,Nm<40,ᵫ⚪\Ny=(36-30)m+(28-24)(120-m)=2m+480,,./=2>0,ÿmḄᜧᜧ.♦.m=40yᨬᜧyᜧ=2x40+480=560.ᵬ⊟!40"#⊟!80"ᡠ%ᑭ'ᨬᜧᨬᜧᑭ'(560ᐗ.ூ+᪆௃ூᑖ᪆௃প0ᵬ⊟!12xᐗ/"ᑣ#⊟!12(6-6)ᐗ/"᪷:“ᵨ1800ᐗᵬ⊟!Ḅᦪ?(ᵨ1800ᐗ#⊟!ᦪ?Ḅ@'ᑡCDEF+GᓽIJ(2)0ᑭ'2yᐗᵬ⊟!m"ᑣ#⊟!(120-")"᪷:“KL⊟!ḄMᡂOPQR3120ᐗ”ᑡCPUVWCmḄYZ᪷:Mᑭ'=ᵬḄMᑭ'+#ḄMᑭ'ᑡC[ᦪᐵ]Vᯠ_ᑭᵨ`a[ᦪḄឋcWCᨬᜧᓽI.

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