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Vilka [71]
3 years ago
9

The equation y= -5.131x^2 +31.821x -3.333 approximates the number of people standing in line to catch a commuter train x hours a

fter 5 a.m.
What is the best estimate for the number of people in line at 8 a.m?
A. 77
B. 46
C. 40
D. 32
Mathematics
2 answers:
Misha Larkins [42]3 years ago
7 0

Answer:

The answer is 42!!! I just took test.


Step-by-step explanation:


IRINA_888 [86]3 years ago
5 0
<span>B. 46 Replacing x with 3 (= 8-5) gives -5.131*3^2 +31.821*3 -3.333 = 45,951</span>
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Answer:

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Step-by-step explanation:

First, let us find the area of the semi-circle.

Area = \frac{1}{2} × π × r²

<u>Given that,</u>

diameter of the semi-circle is ⇒ <em>l</em>

∴ radius ⇒ <em>l / 2</em>

<u>Let us find it now.</u>

Area = \frac{1}{2} × π × r²

Area =  \frac{1}{2} × π × (\frac{l}{2} )^{2}

<u>                                                     </u>

Secondly, let us find the area of the rectangle.

Area = length × width

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width ⇒ w

<u>Let us find it now.</u>

Area = length × width

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Area = lw

<u>                                                      </u>

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Answer:

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Step-by-step explanation:

To find a set of parametric equations for the line y = 4x - 5;

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We then substitute x = t in the original equation;

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Therefore, a set of parametric equations for the line y = 4x - 5 is;

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