The graph modules the amount of money George saved. Which of the following functions models the graph?
A. f (x) = 3/2 +30
B. f(x) = 15x + 30
C. f(x) = 30x + 3/2
D. f(x) = 30.2 + 15

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

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?

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25