5题英文数学题!今天要!
1.Inthecoordinateplane,A=(6,0)andB=(3,4).FindtheareaoftriangleOABwhereOistheorigin.[Hint:TheheightofthetriangleisthediatanceofBfromthex-axis.]
2.Inwhichtwoconsecutivemonthsisthedifferencebetweentheaveragetemperaturesgreatest?Whatisthedifference?
3.Suggesttwofractionswithdifferentdenominatorsbutthesamenumeratorssuchthattheirdifferenceis5/12.
4.Awireisfirstbentintoasquareof9cm.Itisthenbentintoarectanglewithanareagreaterthan70cm2.Findtwopossibledimensionsoftherectangle.
5.Thebaseandtheheightofatriangularmetalplateare8cmand4cmrespectively.Themetalplateismeltedrecastintoametalplaceinheshapeofatrapeziumwithaheightthesameasthatofthetriangle.Findtwopossiblepairsofthelengthsoftheshorterbaseandthelongerbaseofthenewmetalplate.[Hint:Thethicknessofmetalplatescanbeignored.]
(如有不会..可以打解释``就是翻译!)