At the equator earth's surface moves about 4000 kilometers per day.

1 answer:

8 0

A. There are 24 hours in a day, so we have to divide the speed by 24, so we get 166.67

b. Now, to get it in metres per minute, we have to multiply by 1000 (to convert kilometres to metres), and divide by 60 (to convert hours to minutes)

So, we get 2777.78 metres/minute

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Solve the following system of equations by using the substitution method.

Hatshy [7]

X = y + 3
2x + y = 9

Solution..
---------------

Substitute for x=y+3 in the second equation...

2x+y = 9

2(y+3)+y=9

2y+6+y=9
3y+6=9
3y=9-6
3y=3
y=3/3
y=1....

Substitute for y=1 in the first equation...

x=y+3

x = 1+3
x=4..

Am sure the answer is quite evident now...

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ankoles [38]

Answer:

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Step-by-step explanation:

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mario62 [17]

Answer:

solution,

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