Question

Calculate the value of y

Answer 1

y=84

Explanation:

They are all on a straight line. A straight line has 180 degrees. So you have to set the equation to 180.

54+42+y=180

Simplify

96+y=180

Subtract 96 from both sides.

y=84

Answer 2

y = 84°

Explanation:

54 + 42 = 96

180 - 96 = 84

84° is the missing value

Hope this helps!