问题标题：
alevel的数学.1.Simplify(x^3+7^x2+5x-28)/(x+4)2.Factorisecompletelyx^3+5x^2-2x-243.Makerthesubjectoftheformula4.If,findthevalueofywhenx=9giventhaty=24whenx=4.5.TheprobabilitythatIoversleeponanygivendayis1/10.
问题描述：
alevel的数学
.1.Simplify(x^3+7^x2+5x-28)/(x+4)
2.Factorisecompletelyx^3+5x^2-2x-24
3.Makerthesubjectoftheformula
4.If,findthevalueofywhenx=9giventhaty=24whenx=4.
5.TheprobabilitythatIoversleeponanygivendayis1/10.IfIoversleep,theprobabilitythatIamlateforworkis4/5;ifIdonotoversleep,theprobabilitythatIamlateforwoa)Completethistreediagram.
b)WhatistheprobabilitythatIneitheroversleepnorarelateforwork?
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c)WhatistheprobabilitythatIamlateforwork_____________________________________________________________________
rkisonly1/5.
那表格复制不上来
李光正回答：
这都是GCSE的EXtendedlevel的题目,作为中国学生应该很简单啊.
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