Answer: it’s B: 15
Step-by-step explanation:
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This is the formula An = A1 + ( n-1 )D
You would take A19 = -1 + ( 19 - 1 ) -4
-1 + 18(-4)
-1 + -72
-73
Hope that helped!
:)
Answer:
The measures of the angles are 50° and 130°
Step-by-step explanation:
Let
x ----> the measure of one angle
y ----> the measure of the other angle
we know that
If two angles form a linear pair , then their sum is equal to 180 degrees
-----> equation A
----> equation B
substitute equation B in equation A
solve for y

Find the value of x
The measures of the angles are 50° and 130°
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