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anonymous
 one year ago
An expression is shown below:
f(x) = –16x2 + 22x + 3
Part A: What are the xintercepts of the graph of the f(x)? Show your work. (2 points)
Part B: Is the vertex of the graph of f(x) going to be a maximum or minimum? What are the coordinates of the vertex? Justify your answers and show your work. (3 points)
Part C: What are the steps you would use to graph f(x)? Justify that you can use the answers obtained in Part A and Part B to draw the graph. (5 points)
anonymous
 one year ago
An expression is shown below: f(x) = –16x2 + 22x + 3 Part A: What are the xintercepts of the graph of the f(x)? Show your work. (2 points) Part B: Is the vertex of the graph of f(x) going to be a maximum or minimum? What are the coordinates of the vertex? Justify your answers and show your work. (3 points) Part C: What are the steps you would use to graph f(x)? Justify that you can use the answers obtained in Part A and Part B to draw the graph. (5 points)

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Keigh2015
 one year ago
Best ResponseYou've already chosen the best response.0I am sorry this type of math is not my strong suit.

Keigh2015
 one year ago
Best ResponseYou've already chosen the best response.0@misssunshinexxoxo can you help this person with their math?

misssunshinexxoxo
 one year ago
Best ResponseYou've already chosen the best response.0This might help http://www.wolframalpha.com/input/?i=f%28x%29+%3D+%E2%80%9316x2+%2B+22x+%2B+3

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1well you need to factor the equation start with factoring out the negative... \[f(x) = (16x^2  22x  3)\] next multiply 16 and  3 so 48 find the factors of 48 that add to 22 the larger factor is negative its a relatively easy pair to find...

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1that's correct so so to find the xintercepts you need to solve 8x + 1 = 0 and 2x  3 = 0 what values do you get...?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1ok so that's good now part B is it a maximum or minimum...?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1you need to look at the sign of the leading coefficient

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i have no clue @campbell_st

triciaal
 one year ago
Best ResponseYou've already chosen the best response.0do you know what the coefficient is?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1what is the leading term in the equation..?

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1so if its positive then you have a minimum, if its negative you have a maximum

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1great so which do you have, max or min...?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.01\8 is max and and 3\2 in min >??

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1no if the leading coefficient is negative... do you have a max or min,,, it can't be both

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1here is the equation \[f(x) = 16x^2 + 22x + 3\] you said the leading coefficient is 16 that's correct... so if its a potive value you have a minimum if its negative you have a maximum so which do you choose

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1great... now the vertex

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1the easiest way is to find the line of symmetry do you know about that...?

triciaal
 one year ago
Best ResponseYou've already chosen the best response.0dw:1437335587120:dw

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1ok the standard form of a quadratic is \[0 = ax^2 + bx + c\] the line of symmetry is found using \[x = \frac{b}{2 \times a}\] in your question you have a = 16 and b = 22 you need to substitute the values into the equation to find x, the line of symmetry

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1nearly x = 11/16 originally it was 22/32 so you have the x value for the vertex, now substitute that value into the original equation to get the y value in the vertex...

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1so its \[f(11/16) = 16 \times (11/16)^2 + 22 \times (11/16) + 3\] you need to calculate this value...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i hate this question, its so hard

campbell_st
 one year ago
Best ResponseYou've already chosen the best response.1ok.... I have to go anyway.
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