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dsp73
3 years ago
5

Plz help..................

Mathematics
2 answers:
Westkost [7]3 years ago
5 0
The answer is C, x^2 - 6x +9
Daniel [21]3 years ago
4 0
Hello : 
by identity : (a-b)² = a²-2ab +b²
(x-3)² = x² -2(x)(3) +3²
       (x-3)²    = x² -6x +9.... 
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New York City is located about 40˚ north of the equator. If Earth's radius is about 4000 miles, approximately how many miles sou
qwelly [4]

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The answer is "2793 miles"

Step-by-step explanation:

In this firstly we convert degrees to radians, which can be defined as follows:

\to \theta =\frac{40^{\circ} \times \pi }{180^{\circ}}

       =\frac{ 2\pi  }{9}

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3 years ago
What does the asterisk (*) here mean?<br> 2x*5x + 2x*9 + 7*5x + 7*9
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2 years ago
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3 years ago
a certain number of two digit is three times the sum of its digit and if 45 added to it the digit will be reversed find the numb
bogdanovich [222]
· Author has 184 answers and 67.6K answer views
Let the number be (10 x + y)

Then, 10 x + y = 3 * (x + y) (given)

Or, 10 x + y = 3 x + 3 y

Or, 10 x - 3 x = 3 y - y

Or, 7x = 2 y

Or, x = 2 y / 7 ( Eq. 1)

Also, 10 x + y + 45 = 10 y + x ( given)

Or, 10 x - x = 10 y - y - 45

Or, 9 x = 9 y - 45 ( Eq. 2)

Substituting the value of x from (Eq. 1) in (Eq. 2), we have:

9 * 2 y / 7 = 9 y - 45

Or, (9 y ) - (18 y / 7) = 45

Or, 63 y - 18 y = 315

Or, 45 y = 315

Or, y = 7

From (Eq. 1),

x = 2 * 7 / 7 = 2

So, the number is 10 x + y = (10 * 2) + 7 = (20 + 7) = 27

Answer

Check:

Sum of the digits = 2 + 7 = 9

9 * 3 = 27 ✓

Adding 45 to the number 27, we get 72. So, the digits get reversed.
5 0
3 years ago
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