The set s consists of all odd multiples of 3: s = { -9, -3, 3, }. if the integers x and y are in s, then which of the following must also be in s?

a) xy
b) x + y
c) x - y
d) x/y
e) -x - y

explain too, .

Which is f(5) for the function –2x2 + 2x - 3?

Mrs. piazza invested 8000 in a certificate of deposit that pays 3% simple interest for 4 years. how much will be in mrs. piazza's account at the end of 4 years

Juan earns $11 per hour and works at most 30 hours per week. identify the independent and dependent quantity in the situation, and find reasonable domain and range values. amount of money earned; hours worked; 0 to 30; $0 to $330 hours worked; amount of money earned; $0 to $330; 0 to 30 amount of money earned; hours worked; $0 to $330; 0 to 30 hours worked; amount of money earned; 0 to 30; $0 to $330