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Gnoma [55]
3 years ago
5

How do you find the area of a circle?​

Mathematics
1 answer:
olga55 [171]3 years ago
6 0

Answer:

The formula to find the area of a circle is pi times the radius squared (A = π r²).

Step-by-step explanation:

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Which of the following is an extraneous solution of (45-3x)^1/2=x-9?
Iteru [2.4K]

Answer:

C. x =3

Step-by-step explanation:

Extraneous solution is that root of a transformed equation that doesn't satisfy the equation in it's original form because it was excluded from the domain of the original equation.

Let's solve the equation first

\sqrt{45-3x} = x-9\\Taking\ square\ on\ both\ sides\\{(\sqrt{45-3x})}^2 = {(x-9)}^2\\45-3x = x^2-18x+81\\0 = x^2-18x+81-45+3x\\x^2-15x+36 = 0\\x^2-12x-3x+36 = 0\\x(x-12)-3(x-12) = 0\\(x-3)(x-12)\\x-3 = 0\\=> x =3\\x-12 = 0\\x = 12\\We\ will\ check\ the\ solutions\ one\ by\ one\\So,\\for\ x=3\\\sqrt{45-3(3)} = 3-9\\\sqrt{45-9} = -6\\\sqrt{36}= -6\\6\neq -6\\For x=12\\\sqrt{45-3(12)} = 12-9\\\sqrt{45-36} = 6\\\sqrt{36}= 6\\6=6

Hence, we can conclude that x=3 is an extraneous solution of the equation ..

3 0
4 years ago
Find the measure of the are or central angle indicated. Assume that lines which appear to be
Alina [70]

9514 1404 393

Answer:

  ?° = 153°

Step-by-step explanation:

The measure of an arc is the same as the measure of the central angle it subtends. The arc is marked 153°. The central angle (?°) has that same measure.

  ?° = 153°

5 0
3 years ago
Which one is<br> It please help .
denis-greek [22]

Answer:

One

Step-by-step explanation:

A, B, R and C lie on the same plane, while the others do not

5 0
3 years ago
On greenfields chicken farm, 5/6 of the eggs usually hatch. This year only 2/3 as many hatched. What fraction of the total eggs
Maslowich
The answer is 2/3 :)

4 0
3 years ago
Read 2 more answers
Which is the value of this expression when a=5 and k=-2?<br> [3^2a^-2]^k<br> [3a^-1]
Alex Ar [27]

Answer:243 /3125

(Decimal: 0.07776)

Step-by-step explanation:((32)(5−2))2(3(5−1))

((32)(5−2))2(3(5−1))

3 0
3 years ago
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