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3 years ago

Please help me!!!!!!

Mathematics

2 answers:

Lelechka [254]3 years ago

6 0

Answer: kelly or jamal

Step-by-step explanation:

marissa [1.9K]3 years ago

5 0

Answer:

Kelly

Step-by-step explanation:

This is everybodys' rank in order:

Jamal

Luis

Kelly

Marco

Hope this helps!

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nirvana33 [79]

Answer:

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3 years ago

Calculate the velocity of a moving train with a mass 10,000kg and 150,000J of energy.

Viefleur [7K]

Kinetic energy possessed by moving train is $E_k = 150000J$ .

And mass $m = 10000kg$ .

The formula for kinetic energy is $E_k = \frac{m\times v^2}{2}$ .

Solve for velocity:

$E_k = \frac{m\times v^2}{2}\implies 2E_k = m\times v^2$

$v^2=\frac{2E_k}{m}\implies \underline{v = \sqrt{\frac{2E_k}{m}}}$

Now put in the data:

$v = \sqrt{\frac{2\times150000J}{10000kg}}\approx5.48\frac{m}{s}$

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3 years ago

Evaluate the following expression:

Molodets [167]

Answer:

Astronomers were trying to find the weight of six planets - Mars, Venus, Pluto, Jupiter, Mercury, and Saturn. The number of planets lighter than Mars was equal to the number of planets heavier than Venus. Saturn was heavier than Mars and Mercury were heavier than Pluto. Venus was lighter than Mars. Saturn was not the heaviest planet.

Step-by-step explanation:

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3 years ago

What is the answer for -4 (-6x + 3 ) =12

liq [111]

Answer:

x=1

Step-by-step explanation:

Simplify:

24x-12=12

add 12 on both sides:

24x=24

divide both sides by 24

x=1

Hope this helps!

4 0

3 years ago

Please place 0,1, and 1/2 in the correct boxes. Thank you

kolezko [41]

Answer:

The first one is 1/2

The second one is 1

The third one is 0

Step-by-step explanation:

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3 years ago