In ΔCAB, if m∠A = 10x + 9, m∠B = 34°, and m∠C = 97°, what is the value of x?

x = 4

Here is why:

When adding up all angles of a triangle, they will be equal to 180.

Let's add ∠B and ∠C together.

Let's subtract it from 180, that will be the value of ∠A.

Now we can set ∠A equal to 49.

Subtract 9 from both sides.

Divide.

x = 4

chad should not have included the values (1, 2) and (3, 6) because that would mean he only had half a healing card.

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°