Construct a subset of XY plane R^2 that is:

a) closed under vector addition & subtraction, but not under scalar multiplication

b) closed under scalar multiplication, but not vector addition & subtraction

1/3x - 3/2y = 4 2x - by = 20 In this system of equations b is a constant. If the system has no solution, what is the value of b? A) 3/2 B) 9 C) 18 D) 24

Anna has a bag of marbles for her little sister. It contains 12 red marbles, 6 white marbles, and 2 blue marbles, She drops the bag and 3 marbles roll out, What is the probability that all 3 marbles that roll out are white? A. 15/343 B. 1/57 C.

Reduce the following mixed number 2 2/8

The rectangle below has an area of x^2 - 6x - 7 square meters and a width of x - 7 meters. What expression represents the length of the rectangle? x - 7 - width x^2 - 6x - 7 - area

Solve this system of linear equations separate the x - and y - values with a comma 6x=-32-10y 11x=8-10y

What is the balance on an amortized loan of $110,000 after the first payment if the interest rate is 5.5% with a monthly P&I payment of $568? $109,432 $109,496 $109,754 $109,936

What is half of 3.8 million

Is 7 / 10 equal or less than9/100

Compare 1/7 x 4 against 4/7. Which is greater?

Look at the sequence : 5, - 10, 20, - 40, 80