I need the answers to all of these plz :(

3. x = 3.2; y = -0.6

4. countless experimental equations

7. x = -3.375; y = -12.125

8. x = 42/13; y = 2/13

9. countless experimental equations

10. countless experimental equations

11. 12. (I do not get the questions here because there are values of x and y already)

Step-by-step explanation:

3. x + 2y = 2 => 6x + 12y = 12 => 6x = 12 - 12y

   6x - 3y = 21 => 12 - 12y - 3y = 21 => 15y = 9 => y = 9/15 = 0.6

=> 6x = 12 - 12 x 0.6 = 4.8 => x = 4.8/ 6 = 0.3

4. x - y = 9 => y = x - 9

y = x + 4

=> x - 9 = x + 4 => 9 = 4 (Error) => countless experimental equations

7. y = 1/3. x - 11

=> 3x - 1/3. x + 11 = 2 => 8/3. x = -9/(8/3) = -3.375

=> y = 1/3 x -3.375 -11 = -12.125

8. 3x + 2y = 10 => 9x + 6y = 30 => 6y = 30 - 9x

=> 4x - (30 - 9x) = 12 => 13x = 42 => x = 42/13

=> 6y = 30 - 9 x (42/13) => x = 2/13

9. y = -1/4.x -5

=> 2x + 8 x (-1/4x -5) = 56

=> -40 = 56 => countless experimental equations

10. y = -4x -2

=> 12x + 3 x (-4x-2) = 27

=> -6 = 27 => countless experimental equations

angle q= 92 degree

step-by-step explanation:

the solution is in the picture

when a quadrilateral is inscribed in a circle, the opposite angles are supplement to each other. in other words, the sum of the 2 angle is 180 degree