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

Question

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

campbell_st · Answer

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

anonymous · Answer

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