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.

Question

asked Apr 11, 2020 27.7k views

1 Answer

Ahmad Bawaneh · Answer 1 · 2020-04-16T22:46:45+0000

Answer:

Explanation:

3) - Let's call the length AD
.

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

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

- Solve for
, 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
, then:

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

- Solve for
:

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

- 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.