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storchak [24]
2 years ago
5

Which function is a quadratic function? c(x) = 6x + 3x3 d(x) = x – 8x4 p(x) = –5x – x2 k(x) = 2x2 + 9x4

Mathematics
2 answers:
jonny [76]2 years ago
8 0

Answer:

p(x) = –5x – x2

Step-by-step explanation:

just took the test

Citrus2011 [14]2 years ago
7 0
Easy
quadratic means 2nd degree

means highest power of exponent is 2
so like x^2

first one
we have 3x^3, that is 3rd degree,nope

2nd one
we have 8x^4, nope, that is 4th degree

3rd one
we have -x^2, yep

4th one, we have 9x^4, that is 4th degree

answer is 3rd one or p(x)=-5x-x^2
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An airplane, flying at a constant speed of 360 mi/hr and climbing at a 30 degree angle, passes over a point P on the ground at a
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Answer:

Step-by-step explanation:

Given  

velocity of airplane is 360 mi/hr

inclination of climbing 30^{\circ}

Plane velocity can be divided in to x & y component

Velocity in x component is 360\cos30

Velocity in y component is 360\sin30

Thus distance traveled in x axis is =360\cos30\times \frac{1}{60}

=60cos30=51.96 miles

Distance travel in upward direction i.e. in Y axis

=360\sin30\times \frac{1}{60}=30 miles

so total altitude gain by plane is 30+4=34 miles

Horizontal distance traveled is 51.96

inclination w.r.t to point p

tan\theta =\frac{34}{51.96}=0.654

\theta =33.18^{\circ}

Initial inclination is 90^{\circ}

therefore rate at which its distance is changing is 360\cos30=311.76 miles /hour

3 0
2 years ago
two taps drip together at exactly 1:00pm. one tap then drips again every 68 sec while the other tap continues to drip every 72 s
N76 [4]
The least common multiple of 68 and 72 is 1224 so that means we have to add 1224 minutes to 1:00 pm. Convert that to 24 hour time: 1300. 1224 ÷ 60 is 20.4. so the answer will be 1:20 pm.
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5 0
2 years ago
What is the selling price of an item if the original cost is $784.50 and the markup on the item is 6.5 percent?
kotegsom [21]

Answer:

835.49

Step-by-step explanation:

selling price = original cost + markup value

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           = $784.50 *.06.5

           =50.9925

Rounding to the nearest cent

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                      835.49

6 0
2 years ago
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STatiana [176]
<span>
$230,000 in bank A, $240,000 in bank B, $220,000 in bank C

</span>
7 0
2 years ago
Read 2 more answers
PLSSS NEED HELP ASAPP :(( ITS MATH
Bezzdna [24]

Answer:

its either   19.25 or 22.75

Step-by-step explanation:

4 0
2 years ago
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