please help! medals rewarded!
The ratio of the measures of two supplementary angles is 7:3. Find the measures of the angles.
A.
126° and 54°
B.
72° and 18°
C.
159° and 21°
D.
69° and 21°
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OpenStudy (anonymous):
@jim_thompson5910
OpenStudy (anonymous):
7x+3y=180
OpenStudy (anonymous):
wich pair works when you put in the equation
OpenStudy (anonymous):
b?
OpenStudy (anonymous):
?
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OpenStudy (anonymous):
hello?
OpenStudy (anonymous):
i am just checking if 72:18 is 7:3
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
supplementary totals 180 - so you can ignore B and D
OpenStudy (anonymous):
it isnt so check another
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OpenStudy (anonymous):
what is 126/180 and 159/180 = correct one is .70
OpenStudy (anonymous):
So what choice would it be?
OpenStudy (anonymous):
ohh wait correct formula
\[7k+3k=180\]
\[10k=180\]\
\[k=18\]
so the angles are\[7*18\] and \[18*3\]
OpenStudy (anonymous):
so A then!:) right?
OpenStudy (anonymous):
yes
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OpenStudy (anonymous):
dont give medals we dont need
OpenStudy (anonymous):
thanks!:)
OpenStudy (anonymous):
so for this question
The ratio of the measures of two complementary angles is 1:5.
What are the measures of the angles?
A.
30° and 60°
B.
15° and 75°
C.
30° and 150°
D.
5° and 25°
I got the answer B is that correct? @Jonask
OpenStudy (anonymous):
now its complementary so 90
k+5k=90
6k=90
k=15
1*15 and 5*15