The circumference of a circle varies directly with the radius. A circular pizza with a radius of 3in has a circumference of about 18.84in. Write the equation using direct variation that relates the circumference, C, to the radius, r. What is the circumference, in square inches, of a personal pizza with a radius of 2in?

What is the solution to the equation 9^(x+1) =27

1- 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. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?

Explain how you could use the interactive table to tell if sets of points are on the same line. math 8