What is the value of y?

B. 40

Step-by-step explanation:

to solve this, we must know that the interior angles of triangle has a total sum of 180 degrees

first, we can subtract 50 from 180 which is 130. 130 represents the missing degrees in the two other angles.

next. we can set up the equation 2y+y+10=130 to solve for y.

2y+y+10=130

3y+10=130

3y=120

y=40

hope this helped! :))

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°