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

This should be easy but I wanna be sure. I say A or D. Given complex numbers m and n below, what is m + n? m = 10 + i n = 4 - 3i A. 14 - 3i B. 14 - 2i C. 9 + i D. 9 + 7i

145 300 610 1230 In the above sequence every term after the first is formed by multiplying by x and then adding y, where x and y are positive integers. What is the value of x + y?

As online attacks persist, spending on information security software continues to rise. The following table gives the forecast for the worldwide sales (in billions of dollars) of information security software through 2007 (x = 0 corresponds to 2002).

Select the correct answer. Which angle measure less than or equal to 360° is equivalent to an angle of?

During the first week of a summer camp 2 out of 3 campers were boys. During the second week 3 out of 5 were boys. There were a 15 total campers each week. During which week were there more boy campers. Explain

3.7x0.4 = Is equal to the number 1.48

Tanya and Becca are modeling what happens to Earth every 24 hours. Tanya is holding a tennis ball, which represents Earth. Becca is holding a basketball, which represents the sun. What should Tanya do to model what happens to Earth every 24 hours? A.

The price of a train ticket from Orlando to Kansas City is normally $155.00. However, children under the age of 16 receive a 75% discount. Find the sale price for someone under the age of 16. A) $116.25 B) $54.25 C) $271.25 D) $38.75

What is the value of y in the equation 2 (4y - 1) = 6? 0 1 6 8

1 a. Rhian measures the height of one of her tomato plants as 20 cm. Next week it is 15% taller. What is its new height? 1 b. Another tomato plant grows from 240 cm to 312 cm. Calculate the percentage change in height.