School and Work

(4x/6x) + (2/(x+4))

(2/3) + (2/(x+4))

common denominator is 3(x+4)

[2(x+4) + 3 * 2] / [3(x+4)]
(2x+8+6) / (3x+12)
(2x+14) / (3x+12)
[2(x+7) / 3(x+4)]

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Home >All Categories > Science & Mathematics >Mathematics >Open Question Kristine Chou Member since:February 17, 2011Total points:80 (Level 1)A BWIA TRI- STAR jet travels 80km/h faster than a 747 jet linear. the TRI-STARtakes one hour less than the 747jet to travel a journey of 6280km.
denoting the speed of the 747 jet liner by xkm/h:
1)write down in terms of x expressions for:
a) the 747jet liner b) the tri- star
2) form an equation to connect these times and show that it simplifies to x square+ 80x-502400=0Answer Question

Be the first to answer this question.

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