We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
+1
153
8
avatar+1681 
This time, I want to CHECK my answer with you smart people.

PROBLEM:

Consider the parabola \(y=-5x^2+17x-12\) . What is the vertex of this parabola?
Enter your answer as a coordinate pair, that is, as \((x,y)\) where \(x\) and \(y\) are replaced by numbers.

 

\(My\ Work:\)

 

\(Axis\ of\ symetry\ (x\ value) \\=\frac{-b}{2a} \\=\frac{-17}{-10} \\=\frac{17}{10} \\=1.7\)
 

\(Plugging\ it\ in\ (y\ value) \\-5(1.7)^2+17(1.7)-12 \\-5(2.89)+17(1.7)-12 \\-14.45+28.9-12 \\-14.45+16.9 \\+2.45\)

 

\(Answer: \\(1.7,2.45)\)

 

Therefore, I think that the answer is (1.7,2.45)

 

-\(tommarvoloriddle \)

 

EDIT:
If I did somehow get it right, post an emoji (or something) please in the answer section...
If I got it wrong ( probably ) just say I got it wrong, why, and how I should do it next time.
 Jul 14, 2019
edited by tommarvoloriddle  Jul 14, 2019
edited by tommarvoloriddle  Jul 14, 2019
edited by tommarvoloriddle  Jul 14, 2019
 #1
avatar+8829 
+5

You're exactly right!! laugh 👍 🤪  🙌

 

And you can always check your answer to these type of questions with a graphing calculator such as desmos.

 

See here: https://www.desmos.com/calculator/p69ar9yv4q

 Jul 14, 2019
 #2
avatar+1681 
+3

Ok, Thank you:

:)

tommarvoloriddle  Jul 14, 2019
 #3
avatar
0

i love desmos it's so user friendly and easy to usee

Guest Jul 14, 2019
 #4
avatar+1681 
-1

Same here- the only problem is that I have no idea how to save...

 

:(

tommarvoloriddle  Jul 14, 2019
 #5
avatar+792 
+4

To save on desmos you have to creat an acount and creat the graph and click the green save button or you can go to the guid and select from there along with going back to the saved graphs

 

Travisio

travisio  Jul 14, 2019
 #6
avatar+1681 
0

Ok Thank you Travisio

tommarvoloriddle  Jul 15, 2019
 #7
avatar+792 
+3

No problemo amego

 

Travisio

 

Just in case amego means freind
 Jul 15, 2019
 #8
avatar+1681 
-1

Isn't it amigo travis?

 

I am calling you travis now.

 

jlyk

 

Just letting you know=jlyk

tommarvoloriddle  Jul 15, 2019

24 Online Users

avatar
avatar