Question

If AB=36 and AC=12, what is the length of AD? and oh yeah can u answer number 4 for me too thank u.

Answer 1

Explanation:

3) - Let's call the length AD
`x`.

- You know that AB=36 and AC=12, therefore you have:

`(x)/(12)=(12)/(36)`

- Solve for
`x`, then:

`x=(12*12)/(36)\\x=4`

- Then, the answer is the option 4.

4) -Based on the information given in the problem, you can call the length BD
`x`, then:

`(x)/(6)=(6)/(x+5)`

- Solve for
`x`:

`x(x+5)=6*6\\x^(2)+5x-36=0`

- By factoring the equation, you obtain:

`(x+9)(x-4)=0\\x_1=-9\\x_2=4`

- Choose the positive value.

- The answer is the option 4.