exam Maths Puzzle Numerical Ability

ONE NUMBER IS 12 MORE THAN ANOTHER. THE SUM OF THE SMALLER NUMBER AND TWICE THE LARGER NUMBER IS 39. FIND THE LARGER NYMBER.

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exam Other Question

Graph the system of constraints. Then find the values of x and y that maximize A=20x+30y and list the maximum value.

x greater then or equal to 0
y greater then or equal to 0
-2x+4y less then or equal to 4
x less then or equal to 4 what is y=-X2+2x+3