Given equations:



Substitute 3 for y in equation (1);

Substitute 3 for y in equation (3);

Adding equation (4) and (5);

Substitute 2 for x in equation (4);

Therefore, the values of (x,y,z) is (2,3,2).
Answer:
1: toward the normal
2:away from normal
3: red because the index of refraction ( the ratio of the speed of light in a vacuum to the speed of light in a material) is increased for the slower moving waves
1.) the objects have the same temperature
this is the answer because thermal equilibrium is when two substances touch and the temperature becomes the same.
Let's use Newton's 2nd law of motion:
Force = (mass) x (acceleration)
Force = (68 kg) x (1.2 m/s²) = 81.6 newtons .