exam Maths Puzzle Numerical Ability

FIND THE DISTANCE BETWEEN THE POINTS A(4,-3) AND B(-4,3).

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exam Other Question

The sum of three numbers is 8. Twice the smallest is 2 less than the largest, and the sum of the largest and smalles is 5. Use linear system in three variables to find the three numbers. It is 2:07 AM and I am fried. Please help.

Solve by the addition method

5x -3y= -20
3x + 2y= 7