Me ! i’m so dumb and don’t understand this !

First, simplify the first two terms: 3sqrt(x) - 2sqrt(x). This reduces to sqrt(x).

Next, add 4sqrt(x) to this 1sqrt(x); the sum and answer to this question is 5sqrt(x).

∠ A = 35°

Step-by-step explanation:

The measure of the tangent- tangent angle A is half the difference of the intercepted arcs.

minor arc = 145°

major arc = 360° - 145° = 215°

Then

∠ A = ( 215 - 145) = × 70° = 35°