bandsandfand0ms bandsandfand0ms

14-11-2016
Mathematics

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PLEASE ANSWER
There is 100 guests in total. 90 have French heritage, 80 have English heritage, and 75 have Native American heritage. At least how many have heritage from all three cultures?
A: 40
B: 45
C: 22
D: 18

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ampofoeugenia7 ampofoeugenia7

14-11-2016

Using the venn diagram, the intersection or guests of all cultures can be represented by a variable, x.
90-4x+80-4x+75-4x+4x=100
245-8x=100
245-245-8x=100-245
-8x=-145
-8x/-2=-145/-8
x=18.125
I am not sure about this equation but I think the answer is 18

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