Marcos purchases a top-up card for his pre-paid cell phone. His remaining balance, B, can be modeled by the equation B 45 – 0.05n, where n is the number of minutes he's talked since purchasing the card. a) How much money was on the card when he purchased it? b) How many minutes will he have talked when he runs out of money? this? c) What is the slope of this equation? What are the units on the slope?

Click on the y intercept. -x +4 i know you cant click on it so could you just say the coordinates like (example - (1,0) you so much.

The only way to identify an intercept is as an ordered pair. true false

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?