5×67=
a. (67×10)÷2
b. (67x2)+(67×2)
c. (6 ×7)×5
d.(5×6)+(5×7)

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

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?