How do I write these parabolas in vertex form? focus at (4, 3), and directrix x = 2
focus at (2, -1), and directrix x = 8

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.