Find the values of each variable

x = 38°

y = 104°

Step-by-step explanation:

You have to find the value of x and y.

All angles on a straight line are equal to 180° also called supplementary angles.

Step 1: Find y

76 + y = 180° (because supplementary angles)

y = 180 - 76

y = 104°

Step 2: Find x

2x + y = 180° (because supplementary angles)

y = 104°

2x + 104 = 180°

2x = 180 - 104

2x = 76

x = 76/2

x = 38°

Therefore, y = 104° and x = 38°.

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its definatley   this on your answer choice?

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this