If y varies directly as x and given y=9 when x=5. Find x when y=6

Describe the relationship between snowflake and world population to mathematics

Find the volume of the rectangular prism whose length, width and height are (x+3) meter,(x-3) meter and (2x+5) meter hint: area of rectangular prism=lxwxh​

Find the interval of the given expression. 1.f(x) = (x + 3)(x + 1)(x - 1)(x - 3)