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
Answer:
Step-by-step explanation:
Given
Solving (a): 
We have:
Express f(x) as y
Swap x and y
Add 8 to 
Square both sides
Rewrite as:
Express y as:
To determine the domain, we have:
The original function is
The range of this is: 
The 
of the 
function is the 
of the 
function.
<em>Hence, the domain is:</em>
2(x+5) =20 is the translation
