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3 years ago

What is AB? a. 6cm b. 9cm c. 4cm d. 2.2cm

Mathematics

1 answer:

Fed [463]3 years ago

7 0

Answer:

AB = 4 cm

Step-by-step explanation:

The tangent and secant are drawn from an external point to the circle.

Then the square of the measure of the tangent is equal to the product of the external part of the secant and the entire secant.

let AB = x, then

x(x + 5) = 6²

x² + 5x = 36 ( subtract 36 from both sides )

x² + 5x - 36 = 0 ← in standard form

(x + 9)(x - 4) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 9 = 0 ⇒ x = - 9

x - 4 = 0 ⇒ x = 4

However x > 0 ⇒ x = 4 ⇒ b = 4 CM

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3 years ago

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Step-by-step explanation:

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So we need to transform 14.8seconds into Xhours, as follows:

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Using X=0.0041hours in the previous equation instead of 14.8seconds we have:

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3 years ago

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mestny [16]

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3 years ago

Read 2 more answers