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Two angles with measures (5x + 7) and (15x - 7) are supplementary. What is the value of x? a. x = 9 c. x = 42 b. x = 18 d. x = 15
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Asked 9/20/2013 2:28:21 PM
Updated 7/27/2014 2:30:01 PM
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Flagged by andrewpallarca [7/27/2014 2:30:01 PM]
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User: Two angles with measures (5x + 7) and (15x - 7) are supplementary. What is the value of x? a. x = 9 c. x = 42 b. x = 18 d. x = 15

Weegy: 5x^2=15x Move the 15x over to the other side. [ Now you have: 5x^2 - 15x = 0 Does this look more familiar? More like a quadratic? Now try factoring out the monomial, which is in this case 5x. 5x (x - 3) = 0 What will make 5x = 0? 0. What will make x-3 = 0? 3. So your solution set is... {0, 3} ]
keath1219|Points 171|

Question
Asked 9/20/2013 2:28:21 PM
Updated 7/27/2014 2:30:01 PM
1 Answer/Comment
This conversation has been flagged as incorrect.
Flagged by andrewpallarca [7/27/2014 2:30:01 PM]
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(5x + 7) + (15x - 7) = 180;
20x = 180;
x = 180/20;
x = 9

Two angles with measures (5x + 7) and (15x - 7) are supplementary, the value of x is x = 9.
(5(9) + 7) + (15(9)- 7) = 180;
45 + 7 + 135 - 7 = 180;
52 + 128 = 180;
180 = 180
Added 7/27/2014 2:29:58 PM
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