Solve the following System of Equations by either Substitution or Elimination or a combination thereof. Place your answer in coordinate form. 5x+4y−z=1
2x−2y+z=1
−x−y+z=2

https://www.khanacademy.org/math/8th-engage-ny/engage-8th-module-4/8th-module-4-topic-d/v/solving-systems-by-elimination-3

This video link can help you

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.

the weight of the object inside the box!