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OpenStudy (anonymous):
What is the length of ?http://media.apexlearning.com/Images/200703/01/dfcb89a0-c433-4b8b-bb94-d1f7e095c782.bmp
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OpenStudy (igreen):
@Quameshia21 We can set up a proportion. \(\sf \dfrac{21}{7} = \dfrac{27}{x}\) Cross multiply and solve for 'x', can you do that?
OpenStudy (anonymous):
I did that but got the wrong answer.
OpenStudy (igreen):
Cross multiply 21 * x = ? 7 * 27 = ?
OpenStudy (igreen):
Multiply those 2, what do you get?
OpenStudy (anonymous):
27*7= 189 21*x= 21x
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OpenStudy (igreen):
Correct, that gives us: 21x = 189 Now divide 21 to both sides.
OpenStudy (anonymous):
Ok i was doing it wrong. Thanks very much.
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