exam Maths Puzzle Numerical Ability

For the following systems of linear equations
-Determine how many solutions exist
-Use either elimination or substitution to find the solutions (if any)
-Graph the two lines,

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exam Other Question

it takes a plane 5 hours to travel 3000 miles with a tailwind, but it take the same plane 6 hours to travel the same distance with a headwind. hat is the speed of the plane in still air and speed of the wind? 2-i / 3-4i ,2-i/3-4i*3+4i/3+4i, 6+8i_3i_4i^2/15 ,10+5i/15 ,5(2+i)/5(3), 2/3 + 1/3i