Developing Expert Voices

Question 1 : Personal Finance

Debt. Equity Ratio = Total Liabilities - Mortgage / Networth

Lebron is married with two childen. He wants to borrow money to make a major purchase.
His financial advisor prepares a net worth statement for his family with the following.
Lebron and his family live in an $80,000 home on which there is an outstanding mortgage of $52,000.00. He owns a car valued at $20,000.00 and owes 12,000.00 on a 2-year loan he took to buy the car. He has $5000 and a short term personal loan for $2500.00. The family has $1500.00 in a chequing account and another $3000.00 in a savings account. He owns a boat worth $5000.00


Question 2 :

Timeline

May 24: Rough Copy for Questions & Solve Questions
May 25: Create visuals for project
May 26 - 31: Put together all visuals on computer
June 1 - 6: Complete Project
June 7: Hand in Project

Vectors

Freshhh like uhh

So today we started with the new Unit on Vectors so far this is what i understood.

Vector - Distance, Magnitude
Scaler - Distance, Direction

Here are some examples

Examples:



My car weighs 2700 pounds. Scalar has no direction
I drive my car 50 000 km per year. Scalar has no particular direction
Brandon is 2044 km S of Winnipeg. Vector (magnitude = 2044km direction = S)
the wind is 50 kph from the south. Vector (magnitude = 50 kph direction = to the S)

4 Notations

• An arrow indicates magnitude
• tip indicates direction
• Bearings angle is always measured clockwise from the N angle
• always 3 digit number
• Direction of Direction
• Direction Degree Direction

Example

• Bearing 360 - 30 = 330
  
• 60 degress East of South
• 30 degress South of East
• E 30 degress S
• S 60 degress E
  

Next Scribe is Henson

Today in class Mr. K started off by putting us into groups. We were then given problems to solve. You can check the slide for today.



Independent and Dependent event

My understanding about Dependent Variable it's called dependent variable because it's distribution of values depends upon the distribution of the other values or in other words It is something that depends on other factors while Independent Variable is a variable whose value determines the value of other variables or it is a variable that stands alone and isn't changed by other variable.


Here are some examples

The Probability of heads landing up when you flip a coin is 1/2

What is the probability of getting tails if you flip it again? It is still 1/2
The two events do not affect each other because it is an Independent event.

click to open the box

Two balls are drawn successively without replacement from a box which contains 4 blue balls and 3 red balls.
Find the probability that:

(a) the first ball drawn is blue and the second is red
(b) both balls are red.

The second event is dependent on the first

P(blue) = 4/7

There are 6 balls left and out of those 6, three of them are red. So the probability that the second one is red is given by:

P(red) = 3/6 = 1/2 reminder always simplify

dependent event so 4/7 × 1/2 = 2/7

Also dependent event. Using same method, but realizing there will be 2 red balls on the second draw, we have:



The next scriber I choose is : HENSON

MATRICES

Today's class we started off with naming countries, after we all named a country we did a little quiz about "Connectivity Matrices". After we finished correcting the quiz, he gave us a problem and we had to do it with our group and to be hand in before the end of class. There was really nothing new, test is coming up soon, just read through the previous posts and it'll help you with your studying to the unit of matrices.

Here are some examples



What is the size of the matrix?

It would be 3x4 because it has 3 rows and 4 columns

What is entry (2,3) of the matrix?

We are looking for the entry in the second row and the third column of A, which is 4

What is A + B?

Let A = and B =

Matrix addition is defined by adding the corresponding entries of the two matrices.

to get answer go 2nd matrix > hit the right arrow twice > edit > 2x2 plug in [A]

same thing for [B] then , [A] + [B] =

What is the matrix 7Z if Z =

When multiplying a matrix by a scalar, each entry in the matrix is multiplied by the scalar.

the answer is

Let A = and B = Which of the following matrices is equal to the matrix AB?

Since A is a 4 × 3 matrix and B is a 3 × 2 matrix the product AB is a 4 × 2 matrix.

the answer is


Unit test coming up soon so just continue reading the posts everyday.

... and before i end this , the next scribe is ....

HENSON