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3 years ago

Multiply.

Mathematics

2 answers:

shtirl [24]3 years ago

7 0

When you multiply a negative and a positive you will get a negative answer so 3*7 is 21 so -3 * 7 is -21

solong [7]3 years ago

6 0

The answer is -21 because take 3 times 7 which is 21 and sense there's a negative and positive you would make 21 negative.

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Which is more,5 ounces or 1 pund

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3 years ago

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Yuri [45]

Answer:

48 - 3X

Step-by-step explanation:

( 52+2) - 3x - 6

54 - 3x - 6 So first we deal with the numbers in brackets and that is 52 + 2 giving us 54.

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3 years ago

The average density of the material in intergalactic space is approximately 2.5 × 10–27 kg/m3. what is the volume of a lead samp

Lesechka [4]

Answer:

e. $1.8\times 10^{-6}m^3$

Step-by-step explanation:

It is given that,

The density of intergalactic space material is $2.5 \times 10^{-27}$ kg per cubic meter.

And the volume of intergalactic space material is $8.0\times 10^{24} m^3$

So the mass of that much intergalactic space material is,

$m= \rho\times v$ , where 'm' is the mass, and 'v' is the volume.

Putting the values we get,

$m=2.5 \times 10^{-27}\times 8.0 \times 10^{24}$

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It is also given that the mass of lead is the same as the mass of the intergalactic space material. Therefore, the mass of lead is $20 \times 10^{-3}=2 \times 10^{-2}kg$

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$v=1.77 \times 10^{-6}=1.8\times 10^{-6}m^3$

So the volume of lead is $v=1.8\times 10^{-6}m^3$ .

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2 years ago

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