ikoreanx3
T(x)=230/x+60 +450/x+70
Find a simplified form of T(x) by adding the rational expressions in the function's formula. Then use this form of the function to find T(4).
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mathstudent55
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ikoreanx3
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yes.
ikoreanx3
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Hope_nicole
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cross multiply :)
mathstudent55
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You need a common denominator which is (x + 60)(x + 70)
mathstudent55
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Ghazi_Jr
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Mathstudent why did you give her the wrong answer
Hope_nicole
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i would go with cross multiplying.
mathstudent55
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@Ghazi_Jr Why am I wrong?
Hope_nicole
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mathstudent55
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@Hope_nicole This is not an equation where one fraction equals the other. This is a sum of fractions.
Hope_nicole
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ahh, my bad. i read the question wrong. thank you @mathstudent55
mathstudent55
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mathstudent55
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mathstudent55
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ikoreanx3
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Thank you, guys. :)
mathstudent55
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wlcm
ikoreanx3
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Wait o: answer was 20(34x+2155)/(x+60)(x+70)
ikoreanx3
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for T(x) =
mathstudent55
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Just factor the numerator. 680x + 43100 = 20(34x + 2155)
mathstudent55
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