If you were in a hot air balloon 500 m above the ground, at what angle of depression would you look at a point on the ground 800m horizontally from the balloon

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t

Given: pqrs is a parallelogram prove: pr and qs bisect each other at t

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?