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ololo11 [35]
4 years ago
13

the distance between two cities is 400,000 meters If the train travels at a speed of 80 kilometers per hour, how long will it ta

ke the train to travel from one city to the next?
Mathematics
1 answer:
Bumek [7]4 years ago
5 0

first convert 400.000 m to km, 400 km

80 km /h   x    5h= 400km

so it going to take 5 hours of travel

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deff fn [24]
x^2+4y^2=100\implies x^2=100-4y^2
\implies 4y-(100-4y^2)=-20
\implies 4y^2+4y-80=0
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\implies (y-4)(y+5)=0
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When y=4, you have

4(4)-x^2=-20\implies x^2=36\implies x=\pm6

When y=-5,

4(-5)-x^2=-20\implies x^2=0\implies x=0

So there are three solutions, (x,y)\in\{(6,4),(-6,4),(0,-5)\}.
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irina [24]
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Louis has a bag of 2510 shells each pen shell is 18 cm long what is the combine length of the pen shells in meters
svp [43]

Answer:

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Step-by-step explanation:

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Find the vertex of the parabola. y= -4x^2+24x-35<br><br> Answer ASAP
exis [7]

Answer:

(3,1)

Step-by-step explanation:

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substitute x as v

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y = 36 - 35

y = 1

therefore the vertex is

(3,1)

7 0
3 years ago
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Answer:

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