3 years ago

I'll give brainliest to whoever answers. 20 POINTS!!!

Mathematics

2 answers:

chubhunter [2.5K]3 years ago

5 0

Answer:

Step-by-step explanation:

kaheart [24]3 years ago

4 0

Answer:

A is your answer

Step-by-step explanation:

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Answer:

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2 years ago

In the accompanying diagram, PA is tangent to the circle at A and PC is a secant. If

Ganezh [65]

Answer:

c. 12

Step-by-step explanation:

PA² = (BC + PB) × PB => tangent-secant theorem

PA = 8

PB = 4

BC = ?

Substitute

8² = (BC + 4) × 4

64 = 4BC + 16

64 - 16 = 4BC + 16 - 16

48 = 4BC

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12 = BC

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2 years ago

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andreyandreev [35.5K]

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We have

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Substitute

$\dfrac{-4-6}{5-r}=\dfrac{5}{7}\\\\\dfrac{-10}{5-r}=\dfrac{5}{7}\qquad|\text{cross multiply}\\\\5(5-r)=(-10)(7)\qquad|\text{use distributive property}\\\\25-5r=-70\qquad|-25\\\\-5r=-95\qquad|:(-5)\\\\\boxed{r=19}$

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3 years ago

Find the center and the radius of the circle. (x-2)^2+(y+3)^2=70

barxatty [35]

Answer:

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3 years ago

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