12. Since k is constant we can find k when given any point by dividing the y-coordinate by the x-coordinate. For example if y varies directly as x, and y =6 when x=2, the constant of variation is k==3. The equation describing this direct variation is y=3x.
Your answer is 20. Learn PEMDAS and it'll make this much easier. Parenthesis, Exponents, Multiply, Divide, Add, Subtract.
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sorry if im rong b
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