exam Maths Puzzle Numerical Ability

Find the following product.
(0.3x + 0.2) (0.3x - 0.2)

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exam Other Question

Numbers is a game where you bet $1.00 on any three-digit number from 000 to 999.
If your number comes up, you get $600.00. Find the expected winnings? Solve the equation (if possible) and check your soltuion.

4(x+3)-3=2(4-3x)-4