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anonymous
 one year ago
degree measure of an angle is 40° less than 3 times the degree measure of its supplementary angle, what is the degree measure of the angle?
A.
50°
B.
55°
C.
125°
D.
130°
anonymous
 one year ago
degree measure of an angle is 40° less than 3 times the degree measure of its supplementary angle, what is the degree measure of the angle? A. 50° B. 55° C. 125° D. 130°

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mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Do you know what supplementary angles are?

Kash_TheSmartGuy
 one year ago
Best ResponseYou've already chosen the best response.0Angles which have a sum of 180degrees!

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Correct. Two angles whose measures add up to 180 degrees.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Let's call for now the angles x and y. From the fact they are supplementary, we know: x + y = 180

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.190 plus 90 is an example of two supplementary angles Now let's see what our supplementary angles measure.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the answer would be c then

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Once again, the angles measure x and y. x + y = 180 Let's solve this equation for y: y = 180 x That means the two angles measure x and 180  x

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Now we use the given info. "an angle is 40° less than 3 times the degree measure of its supplementary angle" x = 3(180  x)  40 3(180  x)  40 + 180  x = 180 540  3x  40  x = 0 4x + 500 = 0 4x = 500 x = 125

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Correct. The answer is C. 125 deg.
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