What is the value of y?

Mathematics

2 answers:

RUDIKE [14]3 years ago

7 0

Answer:

C. 55

Step-by-step explanation:

Since all angles in a triangle add up to 180°, we have:

40 + y + y + 30 = 180

2y + 70 = 180

2y = 110

y = 55

MrRissso [65]3 years ago

7 0

Answer:

C. 55º

Step-by-step explanation:

A triangle is 180º.

So, 40+y+30+y = 180º Form an equation to solve it. Then combine like terms

70+2y = 180º Subtract 70 on both sides.

2y = 110º Divide 2 on both sides

y = 55º The answer is 55º

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