Anyone? i need help asap plzzz i’ll mark you as brainlist and like it

x = 50°

Step-by-step explanation:

Recall that for a triangle, the exterior angle is equal to the sum of its two remove interior angles (also see attached for reference).

in our case, the exterior angle is given as 105° and its two remote interior angles are x and 55°

therefore

105° = 55° + x

x = 105° - 55°

x = 50°

B. 50°

Step-by-step explanation:

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

answer: -1

step-by-step explanation: