Question

giv the answer
fast plz​

Answer 1

Answer:

Step-by-step explanation:

Reflection is when light bounces off an object. ... Light reflects from a smooth surface at the same angle as it hits the surface. For a smooth surface, reflected light rays travel in the same direction. This is called specular reflection. For a rough surface, reflected light rays scatter in all directions.

Answer 2

15x + 17y = 21. . . (I) 17x + 15y = 11 . . . (II)

In the two equations above, the coefficients of x and y are interchanged. While solving such equations we get two simple equations by adding and subtracting the given equations. After solving these equations, we can easily find the solution.

Let’s add the two given equations.