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Stella [2.4K]
3 years ago
10

4x ( 2a-1) if a is 3A 16B 20 C 23D25​

Mathematics
2 answers:
ANEK [815]3 years ago
8 0
Option B 20 is the right answer refer the attachment if any doubts

marshall27 [118]3 years ago
5 0

Answer:

B 20

Step-by-step explanation:

4 \times (2a - 1)  \\  = 4 \times (2 \times 3 - 1)..(plug \: a = 3) \\  = 4 \times (6 - 1) \\  = 4 \times 5 \\  = 20

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Find the length of CU, the triangles are similar.
Otrada [13]

Answer:

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Step-by-step explanation:

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3 0
4 years ago
Write the equation of a circle for which the endpoints of a diameter are (-2,-2) and (4,-10)
Maurinko [17]

Answer:

Therefore the required Equation of Circle

x^{2}+y^{2}-2x+12y+12=0

Step-by-step explanation:

Given:

End point of Diameter be

point A( x₁ , y₁) ≡ ( -2 ,-2 )

point B( x₂ , y₂) ≡ ( 4 , -10 )

To Find:

Equation of a circle =?

Solution:

When end points of the Diameter are A( x₁ , y₁) , B( x₂ , y₂). then the Equation of Circle is given as

(x-x_{1})(x-x_{2})+(y-y_{1})(y-y_{2})=0

Substituting the end point are

(x-(-2))(x-4)+(y-(-2))(y-(-10))=0\\(x+2))(x-4)+(y+2))(y+10))=0\\

Applying Distributive Property we get

x^{2} -2x-8+y^{2}+12y+20 =0\\\\x^{2}+y^{2}-2x+12y+12=0

Therefore the required Equation of Circle

x^{2}+y^{2}-2x+12y+12=0

6 0
3 years ago
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