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Brrunno [24]
2 years ago
14

The mass of the part of a metal rod that lies between its left end and a point x meters to the right is 3x^2 kg. Find the linear

density when is 1 m, Where is the density the highest? The lowest?
Mathematics
1 answer:
Sav [38]2 years ago
4 0

Answer:

6 kg/m

Step-by-step explanation:

mass m = 3x^2.

rho ρ= dm/dx =6x

ρ(1) =6 Kg/m

linear density is the derivative of mass (m)  with respect to position(x)

that is how fast is the mass changing at that position.

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If C is between A and B, then answer the following if AB=40, AC= 2x+10, CB= 3x-5
Marat540 [252]

If C is between A and B, then, we can write the equation

AB = AC + CB


Substitute the value of AB and the expressions for AC and CB in terms of x.


40 = (2x+10)+(3x-5)


We can now solve for x.



40-10+5= 2x+3x



35=5x


Dividing by 5.


7=x


AB=40



AC=2(7)+10



AC=14+10



AC=24




BC=3(7)-5



BC=21-5


BC=16



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Someone help me please I'm so desperate
ludmilkaskok [199]

Answer:

126 tiles

Step-by-step explanation:

The while tiles are 3/4 of a foot (or 9 inches) x 9 in, so their area is 81 sq in. There are 14 blue tiles, so 14 x 81 = 1134 sq inches that need to be covered.

Each tiles is 3 x 3, so its area is 9 sq in. 1134 / 9 = 126 tiles

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A lamborghini traveled 220 miles in 4 hours. How many miles does the lamborghini drive per hour (speed)?
Aleonysh [2.5K]

Answer:

55 mph

Step-by-step explanation:

220m    per 4 hours  

so 220 devieded by 4 gives u your answer

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Question 2 (Multiple Choice Worth 1 points)
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