7. Fred had 85 marbles. After a few games, he had 120% of his original number. How many
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You need to complete the square in x and in y,
First, group the x-terms and the y-terms separately.
Move the 10 to the right side by subtracting 10 from both sides.
Now complete the square in x and in y.
The constant you need to add to complete each square is the square of half of the coefficient of the x or y term. Make sure to add the constants to both sides of the equation.
First, group the x-terms and the y-terms separately.
Move the 10 to the right side by subtracting 10 from both sides.
Now complete the square in x and in y.
The constant you need to add to complete each square is the square of half of the coefficient of the x or y term. Make sure to add the constants to both sides of the equation.