What is the value of y in the triangle?

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

Bring the fraction a/a-4 to a denominator of 16-a^2