exam
Maths Puzzle
Numerical Ability
If 9y^2+kyz+16z^2 is a perfect square find a value of k
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exam Other Question
How to do you graph the problem with a function like this y=21-2x
i dont understand on how to do these kinds of problems. I have tried doing it and using the examples but i just cant seem to get it..
can you please help me thank you -Krista