A neighborhood has 250 families. Natalie randomly selects 20 families to survey about recycling. Of the 20 families she surveyed, 18 of them recycled. About how many families in her neighborhood recycle?

families?

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?

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

What is the measure of angle 1? a.28 b.152 c.168 d.64