我有好多条数学问题都唔识答!(因为睇唔明D英文...)
希望各位高手们能「拔刀相助」!
P.S.
Q.1
Findano.xthatcanbeusedtoeliminatethefractionsintheequation：
c-5／6+3=2-c／8bymultiplyingitonbothsides.
Q.2
Ifthetwoadjacentsidesofasquaremeasureycmand(2y-3)cm
respectively,findtheperimeterofthesquare.
Q.3
ThecostofteaYis$30perkg,thecostofteaXis$20perkg.IfzkgofteaY
and(z+1)kgofteaXaremixedtogether,andthecostofthemixedteais
$24perkg.Findz.
Q.4
Annahadabagofglassbeads.Sheusedhalfofthebeadstomakeanecklace.Sheandhersisterthenuse1／6and1／7ofthebeadsrespectivelytomake
twobracelets.Ifthereare16glassbeadsleft,findtheoriginalno.ofglassbeads.
Q.5
Twoshopssellthesamebrandofchocolateatthesameprice.Todaytheybothcutdownitsprice.ShopAlowersthepriceby30%,andincreasesby30%afteraweek.Likewise,shopBlowersitspriceby40%,andincreasesby40%aftera
week.Arethepriceofthechocolateatthetwoshopsstillthesameafteraweek?
Q.6
Ifwedrawatriangleonanegg,wouldtheanglesumoftrianglebe180°?Explain.
请各位尽量帮手!答唔晒都可以!