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kozerog [31]
3 years ago
7

Need help i am really confused

Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
3 0
Your answer is C.
Once simplified they each have the same product.
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The equation of a circle is given below.
BARSIC [14]

<u>Given</u>:

The equation of the circle is x^2+(y+4)^2=64

We need to determine the center and radius of the circle.

<u>Center</u>:

The general form of the equation of the circle is (x-h)^2+(y-k)^2=r^2

where (h,k) is the center of the circle and r is the radius.

Let us compare the general form of the equation of the circle with the given equation x^2+(y+4)^2=64 to determine the center.

The given equation can be written as,

(x-0)^2+(y+4)^2=64

Comparing the two equations, we get;

(h,k) = (0,-4)

Therefore, the center of the circle is (0,-4)

<u>Radius:</u>

Let us compare the general form of the equation of the circle with the given equation x^2+(y+4)^2=64 to determine the radius.

Hence, the given equation can be written as,

x^2+(y+4)^2=8^2

Comparing the two equation, we get;

r^2=8^2

 r=8

Thus, the radius of the circle is 8

3 0
3 years ago
1 = 1/4(2x + 8)<br> Need help finding the answer to this!!!
PolarNik [594]

1 = 1/4(2x+8)

1 = 1/2x + 2

1 - 2 = 1/2x

(-1) = 1/2x

x = (-1) : 1/2 = (-1) × 2/1 = (-2)

Answer : x = (-2)

3 0
3 years ago
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The pH scale for acidity is defined by pH= -log subscript 10 [H superscript+] where [H superscript+] is the concentration of hyd
gtnhenbr [62]

Answer:

The concentration of hydrogen ions in moles per liter (M) is 3.981 * 10^{-9}

Step-by-step explanation:

As we know

The hydrogen ion concentration of any solution at pH is given by

H^+ = 10^{-pH}

Substituting the given values in above equation, we get -

H^+ = 10^{-8.4}\\H^+ = 3.981 * 10^{-9} mol/l

The concentration of hydrogen ions in moles per liter (M) is 3.981 * 10^{-9}

8 0
3 years ago
Draw Conclusions The decimal 0.3 represents What type of number best describes 0.9, which is 3.0.3? Explain
Anon25 [30]

Answer:

The product represent the number 3\times 0.3=0.9

Step-by-step explanation:

To find : The decimal 0.3 represents What type of number best describes 0.9, which is 3.0.3?

Solution :

0.3 represents 0.3=\frac{3}{10}

0.9 represents 0.9=\frac{9}{10}

If we multiply 0.3 by 3 we get 0.9

As, 3\times 0.3=3\times \frac{3}{10}

3\times 0.3=\frac{9}{10}

3\times 0.3=0.9

Therefore, The product represent the number 3\times 0.3=0.9

8 0
3 years ago
Help please please please ok
Svet_ta [14]
6h + 21 please mark brainliest
6 0
2 years ago
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