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madam [21]
3 years ago
8

Rewrite each expression by combining like terms.

Mathematics
2 answers:
Andrej [43]3 years ago
8 0

Answer:

1) 5\times y-2xy=y(5-2x)

2) 4q + 2q - 6=6(q-1)

Step-by-step explanation:

1) 5\times y-2xy

In both terms given in an expression has common variable of 'y', so we can take that common.

The expression will be written as:

5\times y-2xy=y(5-2x)

2) 4q + 2q - 6

In two terms out of three in an expression has common variable of 'q', so we can take that common.

The expression will be written as:

4q + 2q - 6=2q(2+1)-6

=2q(3)-6

=6q-6

4q + 2q - 6=6(q-1)

Evgesh-ka [11]3 years ago
4 0

Answer:

5y-2xy

6q-6

Step-by-step explanation:

For the first expression, we can multiply 5 by y to get 5y. Thats all we can simplify it though, because xy is not equal to x or y.

For the second equation, we can easily add the variables to simplify. 6q-6

Hope this helps!

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3 years ago
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5 0
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Read 2 more answers
100 POINTS PLEASE HELP ME!!
Serga [27]
3)

check the picture below.

bearing in mind that the point of tangency, the green one there, is always a right-angle, then we get that much for the distance AB.

since the satellite can emit a signal at a speed of 186,000 miles/second, how long will it be to cover AB?  well, it'll just be AB/186000, which is about 0.1381 seconds.

and how long will it be to cover the distance AE?  well, it'll just be AE/186000, which is about 0.11828 seconds.

of course is quicker to AE since it's closer, so the difference for both distances will be AB - AE, which is about 0.01984121052328095721 seconds.



4)

if the satellite makes a revolution, or 2π, in 24 hours, and we know the satallite is orbiting at 22000+4000 or 26000 miles from the center of the Earth, thus its circular orbit has a radius of 26000, how many miles is that?

well, Circumference of a circle is C = 2πr, if r = 26000, then C = 2π(26000), so on those 24 hours it has covered 52000π miles.

how fast must it travel then?    \bf \cfrac{52000\pi }{24}~\cfrac{miles}{hours}\qquad \approx \qquad 6806.78~\frac{miles}{hour}

now if you need the rate in miles/seconds, bear in mind that an hour has 60 minutes and each minute 60 seconds, thus and hour has 60*60 seconds or 3600, thus its speed in miles/seconds will be 52000π/3600.

8 0
3 years ago
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