Answer:
x = 99°
Step-by-step explanation:
first: find the supplement to 123°:
180 - 123 = 57°
second: since all triangle interior angles total a80°:
180 - 42 - 57 = 81°
third: x = the supplement to 81°, so, x = 180 - 81 = 99°
That is C and B. The missing lengths
2, 70$ : 3 = 0, 9o $The total cost for each pen
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I think pencil and paper would be the best method
