In November, the daily low temperature decreases by 2 degrees F each day. Which of the following arithmetic sequences could represent the daily low temperature? −2, −4, −8, −16, −32, …

−8, −6, −4, −2, 0, …

2, −4, 8, −16, 32, …

8, 6, 4, 2, 0, …

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315

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?