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vaieri [72.5K]
2 years ago
14

The graph below shows the relationship between test grades and shoe sizes of the students in Dexter's class.

Mathematics
2 answers:
FrozenT [24]2 years ago
4 0
Yeah that is correct so yeah you are right I don’t know any more information that I could give you but I’m pretty sure you just said it right so yeah
valentina_108 [34]2 years ago
3 0

Answer:

the answer is a

Step-by-step explanation:

khan academy

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SHOW ALL WORK BUT KEE IT SIMPLE AND EASY TO UNDERSTAND:)
7nadin3 [17]
To do this problem, you need to use a process called completing the square. Let me explain:  

To complete the square on the function f(x) = x² + 8x +13, first group the first two terms in (  )  and leave some space at the end as follows:
f(x) = (x² + 8x          ) + 13  Now our next step is to fill in the space and adjust our expression on the right hand side of the function.  To do this, we take half of the middle number 8 and then square it:  so 4² = 16 and we fill in our space inside the ( ) with this value 16;   
f(x) = (x² + 8x + 16) + 13  now what we have done is to increase the overall value of our expression on the right by 16, but we want the overall value to remain the same.  To fix this we simply need to subtract 16 at the end like this:  f(x) = (x² + 8x + 16) + 13 -16   we can simplify and get the following.
f(x) = (x² + 8x + 16) - 3   At this point we're almost done.. All we need to do now is to rewrite the what is in the parentheses in a slightly different form.  Here is what it will look like:  f(x) = (x + 4)² - 3  notice all I did was take the sum of the square root of x² and the square root of 16 originally in the (  ) to get then new expression inside the ( ) and then square that  ( )²

Now this is a nice form to have because you can get the vertex straight from this form.. IN FACT this is called vertex form or (h,k) form for short.  In general the form is f(x) = a(x - h)² + k  don't worry about the 'a'  for now.. you might see that in our case it is just 1 and will not effect our equation.  You only have to consider this if the original leading coefficient of the quadratic is not 1 to begin with...

So you can see that our vertex is (-4,-3)  
Hope this is helpful, but if you have questions let me know.
5 0
3 years ago
I need help with number 4 please help and explain
Shtirlitz [24]
Are you trying to find the area?
7 0
3 years ago
What is the range of 17, 12, 28, 21, 14, 74, 32, 14, 25, 23
natita [175]

Answer:

it's 22 I hope you got it right if not then i'm sorry

8 0
2 years ago
Read 2 more answers
PLZ help me with this question
olga2289 [7]

Answer:

3

Step-by-step explanation:

3x4=12

its 3 because you need to find the balances so when you have 3 and you multiped my 4 you get 12 same as the other square.

3 0
2 years ago
What is the difference & similarities of matter and mass ?
Tamiku [17]
 that differences are that mass is a measurement of the amount of matter something contains  and mass is measured by using a balance comparing a known amount of matter to an unknow of matter
5 0
3 years ago
Read 2 more answers
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