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pochemuha
3 years ago
14

What is the length of segment BC 4 5 6 7

Mathematics
2 answers:
tester [92]3 years ago
8 0

Answer:

Length BC : 5 units.

Step-by-step explanation:

Given  : Line BC with B (  -3 ,-2) and C ( 0 ,2) .

To find : What is the length of segment BC.

Solution : We have given  Line BC with B (  -3 ,-2) and C ( 0 ,2) .

Length of BC  mean distance between the point B and C.

Distance formula  : \sqrt{(x_{2} -x_{1})^{2} +(y_{2} - y_{1})^{2}}.

x_{1} = -3\\x_{2} = 0\\y_{1} = -2\\y_{2} = 2.

Plug the values in above formula.

Length BC : \sqrt{(0 -(-3))^{2} +(2 - (-2))^{2}}.

Length BC : \sqrt{(0+3))^{2} +(2 +2))^{2}}.

Length BC : \sqrt{(3)^{2} +(4)^{2}}.

Length BC : \sqrt{9 +16}.

Length BC : \sqrt{25}.

Length BC : 5 units.

Therefore, Length BC : 5 units.

xxTIMURxx [149]3 years ago
7 0
The correct answer is 5 because the square root of 25 is 5

Hope this helped :)
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The answer is B. 32
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A store pays $22 for a duffel bag. The store marks up the price by
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Answer: y=0,5x²-x-1,5.

Step-by-step explanation:

(-1;0)\ \ \ \ (3;0)\ \ \ \ (1;-2)   \ \ \ \  y=ax^2+bx+c\ ?\\\left\{\begin{array}{ccc}a*(-1)^2+b*(-1)+c=0\\a*3^2+b*3+c=0\\a*1^2+b*1+c=-2\end{array}\right \ \ \ \  \ \left\{\begin{array}{ccc}a-b+c=0\ \ (1)\\9a+3b+c=0\ (2)\\a+b+c=-2\ (3)\end{array}\right  \\

We summarize (1) and (3):

2a+2c=-2\ |:2\\a+c=-1\ \ \ \ \Rightarrow\\a+b+c=-2\\(a+s)+b=-2\\-1+b=-2\\b=-1.

Substitute b=-1 into (2):

9a+3*(-1)+c=0\\9a-3+c=0\\9a+c=3\ \ (5).\\

From (5) subtract (4):

8a=4\ |:8\\a=0,5.\ \ \ \  \Rightarrow\\

Substitute a=0,5 into (4):

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Hense:

y=0,5x²-x-1,5.

5 0
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