Why calculate the variance covariance matrix for a portfolio

In a cafeteria, 1/6 of the students are eating salads, and 2/3 are eating sandwiches. There are 18 students in the cafeteria. How many students are eating lunches other than salads or sandwiches?

Cathy needs to collect linear data. Which set of data should Cathy collect? A) the height of a building for twenty years B) the height of a person from birth to age twenty C) the height of a tree for twenty years from the time it was planted D) the

A cherry trees shadow is 12 meters long. Not far away, an elms trees shadow is 8 meters long. If the cherry tree is 9 meters tall, how tall is the elm tree

If the domain of the function y = 10x is all real numbers, the domain of its inverse would be: a. all real numbers b. Negative inteegers only c. All positive real numbers only d none of the above

Jhon, mina and tim share out a bag of sweet at a ratio of 2:5:7. If there are 20 sweets in the bag how many sweets does each of them get.

Why a mixed number is called "mixed" number what is mixed up here? Because a whole number such as 1 or two is "mixed" with a fraction such as 1/2, 1/4, or 3/8ths. Because numbers are all mixed up. Because a fraction is added to a whole number.

Factor q^3-125 completely.

Freida earns $5.85s per hour. to find the amount of money freida earns working x hours, use the equation y=5.85. how many dollars does Freida earn of she works 2.4 hours?

Determine the mean, median, mode, and midrange for this collection of class test scores: 88 82 97 76 79 92 65 84 79 90 75 82 78 77 93 88 95 73 69 89 93 78 60 95 88 72 80 94 88 74 a. Mean is 84, median is 82, mode is 82, midrange is 77 b.

In a cohort of thirty graduating students, there are three different prizes to be awarded. if no student can receive more than one prize, in how many different ways could the prizes be awarded?