Answer:
m<a = 30°
m<b = 90°
m<c = 60°
Step-by-step explanation:
Angles a, b, and c are all angles on a straight line.
Angles on a straight line add up to 180°.
Therefore, a + b + c = 180°
Given that a:b:c = 1:3:2, the measure of each can be calculated as follows:
Measure of each angle = the ratio proportion of that angle ÷ total ratio proportion * 180°
m<a = 
m<b = 
m<c = 
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Answer:
<h2>

</h2>
Step-by-step explanation:

Remove unnecessary parentheses

When there is a (-) in front of an expression in parentheses, change the sign of each term in the expression

Collect like terms


Add the numbers

Use the commutative property to reorder the terms

Hope this helps...
Best regards!!