Question

What is the length of ?http://media.apexlearning.com/Images/200703/01/dfcb89a0-c433-4b8b-bb94-d1f7e095c782.bmp

Answer 1

@Quameshia21

We can set up a proportion.

\(\sf \dfrac{21}{7} = \dfrac{27}{x}\)

Cross multiply and solve for 'x', can you do that?

Answer 2

I did that but got the wrong answer.

Answer 3

Cross multiply

21 * x = ?
7 * 27 = ?

Answer 4

Multiply those 2, what do you get?

Answer 5

27*7= 189
21*x= 21x

Answer 6

Correct, that gives us:

21x = 189

Now divide 21 to both sides.

Answer 7

Ok i was doing it wrong. Thanks very much.