Eva buys braces for her daughter on an installment plan. The braces cost $2,500. If she puts 10% down and her monthly payment is $75 for 3 years, what is the finance charge?

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?

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122