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alexira [117]
3 years ago
7

What is the length of the radius, r?

Mathematics
2 answers:
Snowcat [4.5K]3 years ago
7 0
The answer is {A} Hope this helps! :)

kolezko [41]3 years ago
3 0

Answer:

Option B. (x - h)² + (y - k)² = r²

Step-by-step explanation:

Equation of a circle which passes through a point P(x, y) and center at (0, 0) then the equation of the circle is represented by

x² + y² = r²

If center of the circle is moved from origin (0, 0) to (h, k) then we have to find the equation.

(x - h)² + (y - k)² = PQ² = r² [Distance between two points P and Q]

Therefore option B is the correct answer.

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If 8 g of a radioactive substance are present initially and 2 yr later only 4 g remain, how much of the substance will be presen
My name is Ann [436]

Answer:

none

Step-by-step explanation:

8-4=4

if every 2 years, 4 gallons disappear

then every 1 year, 2 gallons disappear

meaning that by 5 years there will be no substance left.

(5*2=10)

7 0
2 years ago
370 is 125% of what number?
bonufazy [111]

Answer:

125/100 x N = 370

x 100 x 100

125n = 37,000 (since your multiplying what you got to the variable)

Divide by 125

N = 296

7 0
2 years ago
Finding the area of A=1/2bh
DiKsa [7]

Yes that is correct.

6 0
3 years ago
Whats the difference of the two expression? (3/7x+9)-(2/7x-3)
Aleksandr-060686 [28]
\left(\frac{3}{7}x+9\right)-\left(\frac{2}{7}x-3\right)\\\\=\frac{3}{7}x+9-\frac{2}{7}x-(-3)\\\\=\frac{3}{7}x+9-\frac{2}{7}x+3\\\\=(\frac{3}{7}x-\frac{2}{7}x)+(9+3)\\\\=\frac{3-2}{7}x+12\\\\=\boxed{\frac{1}{7}x+12}
4 0
3 years ago
u don’t need to do the explanations for the questions. Just answer each expression with correct/incorrect. thank-you :)
tigry1 [53]

Answer:

correct

incorrect

incorrect

correct

5 0
3 years ago
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