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charle [14.2K]
3 years ago
10

20 points!!!!

Mathematics
2 answers:
valentinak56 [21]3 years ago
8 0
No, because the sample was not random
poizon [28]3 years ago
8 0
A more accurate reason would be that the sample was not big enough to represent the population as a whole, the best answer is "No, because the sample was not random"
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Satellite dishes are shaped like parabolas to optimally revive signals. The cross section of a satellite dish can be modeled by
Anna11 [10]

The cross section of the satellite dish is an illustration of a quadratic function

The quadratic function that models the cross-section is y = 1/6(x^2 - 9)

<h3>How to determie the equation of the cross-section?</h3>

The given parameters are:

Width = 6 feet

Depth = 1.5 feet

Express the width the sum of two equal numbers

Width = 3 + 3

The above means that, the equation of the cross section passes through the x-axis at:

x = -3 and 3

So, we have:

y = a(x - 3) * (x + 3)

Express as the difference of two squares

y = a(x^2 - 9)

The depth is 1.5.

This is represented as: (x,y) =(0,-1.5)

So, we have:

-1.5 = a(0^2 - 9)

Evaluate the exponent

-1.5 = -9a

Divide both sides by -9

a = 1/6

Substitute 1/6 for a in y = a(x^2 - 9)

y = 1/6(x^2 - 9)

Hence, the quadratic function that models the cross-section is y = 1/6(x^2 - 9)

Read more about quadratic functions at:

brainly.com/question/1497716

7 0
2 years ago
Which situation below has a negative correlation?
Schach [20]

Which situation below has a negative correlation?

The younger the child, the more sleep they need.

<em>*100% CORRECT ANSWERS (SEE ATTACHMENTS)</em>

7 0
3 years ago
Please help me asap ​
lana [24]

the top question is the second answer and the second question is also the second answer

4 0
3 years ago
Which expression is equivalent to 2(3 - x) - 12 + 4x<br><br> 3x - 6<br> 3x - 7<br> 2x - 7<br> 2x - 6
Nadya [2.5K]
The answer is b. 3x-6
5 0
2 years ago
(4 + 3x + x2) + (6 – 9x + x2)
Gnoma [55]
If your looking for a simplified answer, it would be 2x^2-6x+10.

Hope this helps.
3 0
2 years ago
Read 2 more answers
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