Solve the system. x – 4y – z = 21 6x – 3y – z = –4 –x +2y –5z = 19 x =      , y =      , z =      

Consider the given equations:

 (Equation 1)

   (Equation 2)

       (Equation 3)

Adding equations 1 and 3, we get

So, we get (Equation 4)

Multiplying equation 3 by '6', we get

      (Equation 5)

Subtracting equation 5 from equation 2, we get

    (Equation 6)

Multiplying equation 4 by '21' and adding it to equation 6, we get

So, z = -5

Since,

So, y=-5

Now,

So, x = -4

Therefore, x = -4, y= -5 and z= -5 are the solutions to the given equations.

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing

step-by-step explanation:

i think the answer would be c