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Mathematics 39 Online
OpenStudy (anonymous):

Joy is training for a triathlon. She runs a distance of 2x miles, cycles a distance of (x2 + 7) miles, and swims a distance of (x - 2) miles. Which simplified expression is equivalent to the total distance, in miles, Joy covers? a)x2 + 3x + 5 b)x2 + 3x + 9 c)3x2 + 5 d)3x2 + 9

OpenStudy (campbell_st):

so the distance is D = 2x + x^2 + 7 + x - 2 collect like terms for the answer

OpenStudy (anonymous):

2x+x^2+7+x-2 x^2+2x+x+7-2 x^2+3x+5

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