book Maths Puzzle Numerical Ability

What is the answer to this binomial, (x+3) (2x-5)

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solve using the calculator.

3x+2y=3
y=(3/2)x-(1/2)

(3/2)and(1/2) are shown as fractions out of paranthesis on my paper.
A kite on a 250 foot string makes a 58° angle with the ground. What is the height of the kite above the ground to the nearest foot?