exam Maths Puzzle Numerical Ability

The equation of Circle P is X squared + Y squared - 6x + 4y= 21, and the equation of circle Q is X squared + y squared - 8x + 10y = 11. How do I find the difference between the centers of these circles?

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exam Other Question

Directions for both problems are the same:Write each expression in simplest form

Problem#24, sect. 5.1

(4x-28)/(5x-35)

Problem#36 sect. 5.1

(4r^2-25s^2)/(2r^2+3rs-20s^2) An arithmetic student needs an average of 70 or more to receive credit for the course. She scored 80, 66, and 65 on the first three exams. Write an inequality representing the score she must get on the last test to receive credit for the course.