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anonymous
 one year ago
What is the xcoordinate of the vertex of the parabola whose equation is y = 3x2 + 9x?
anonymous
 one year ago
What is the xcoordinate of the vertex of the parabola whose equation is y = 3x2 + 9x?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the xcoordinate of the vertex of y = ax^2 + bx + c is given by: x = b/(2a).

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0y = 3x^2 + 9x = 3x^2 + 9x + 0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0a = 3, b = 9, and c = 0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the xcoordinate of the vertex is: x = b/(2a) = 9/[2(3)] = 3/2 = 1 1/2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.03 1  this are the answer choices @EllenJaz17

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What's the last option? It's just a negative sign

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no its 2 over 3 2/3

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and so is the second answer is 1 and 1 over 2 somethuing like this 1 1/2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0y = 3x^2 + 9x y = 3(x^2 + 3x + 9/4)  27/4 y = 3(x + 3/2)^2  27/4 From this, we can see a low point and vertex when: x = 3/2 because that's when the first term is smallest. So, x = 3/2
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