Write a linear equation in slope-intercept form to model each situation; A Norfolk pine is 18 inches tall and grows at a rate of 1.5 feet per year.

A Cairn terrier weighs 30 pounds and is on a special diet to lose 2 pounds per month.

An airplane at an altitude of 3000 feet descends at a rate of 500 feet per mile.

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

1- 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.2- 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 the first question?

You buy five cds at a sale for $5.95 each. write an expression for the total cost of the cds.then use the distributive property and mental math to evaluate the expression.