3 years ago

What is the distributive property of 9(3x+2)

2 answers:

7 0

You can solve that equation by using the distributive property.

9 times 3 is 27. So the first term would be 27x.
9 times 2 is 18. So the second one should be 18.

Altogether, the answer is 27x+18.
You're welcome.

Alenkinab [10]3 years ago

6 0

=9(3x+2)
=27x+18
The answer is 27x+18.

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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:

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