October 27

Precalc 11 – Week 8

This week in precalc 11 we learned about the standard form aka Vertex form.

The standard form is the most useful form for finding graphs.

the formula is  y = a(x-p)^2 + q.

everything in the formula says something about the graph. Starting with a, a will usually tell you how thin or how wide a graph is. If there is no number there a = 1. And when a = 1 then we can see the width by following this: 1, 3, 5. those numbers show how far over you will go every time. so you go up 1 over 1 up 3 over 1 up 5 over 1 and you should hit the graph each time. but if a = 2 then you would go 2, 6, 10. Notice how when a is > than 1 the graph become longer and skinnier. when a becomes smaller it becomes wider.

the next important piece is p. P is sometimes difficult to understand. It determines if your graph slides to the left or right and is also the line of symmetry. so if you have (x-3)^2 and so 3 is your p variable then you would move 3 to the right. I know you see the negative and think you will be going left but you go just what p is if it was $latex (x – -3)^2 then you would move 3 to the left because p was -3.

now we have come to q. q determines where you are on the axis and this one doesn’t become weird like p with the negative in front you just put it wherever it says it is so if it’s -5 then you have the graph at -5.

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October 20

Week 7 in precalc 11

This week in precalc 11 we had review for our unit test and then we relearned graphs after that. We also learned about the parabola. A parabola is a U shaped curve on a graph that is symmetrical on either side. when we look at that graph we should be able to find the vertex, line of symmetry, x-intercept, y-intercept, domain and range. I found that when we first worked on the graphing that it was decently easy but when we progress it becomes more difficult (as always).  One thing to note is that the vertex is one of the most important pieces of information and it can be the highest point on the graph or the lowest (min, max).

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October 17

Week 6 in precalc 11

This week in math 11 I learned about the quadratic formula.

the quadratic formula looks like this :

Image result for quadratic formula

in order to fill in the variables you need to know what is what.

so when you’re looking at an equation it will look like

ax^2 + bx + c = 0.

your a variable is obviously the number in front of the x^2 but if there is no number in front of it, a = 1. b is the second variable and it is the one in the middle of the equation and c is separate on its own.

It takes more time then completing the square and factoring but it is a good way to get the correct answer since you fill in all the variables and get a more direct answer.

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October 15

Week 5 in Precalc 11

This week in math 11 I learned the acronym CDPEU we can easily remember the acronym by using the expression “Can divers pee easily underwater”. The acronym means Common factors, Difference of squares, patterns, easy and ugly. this is meant for when we have an equation like x^2 + ax + b.

C – common factors. If you see any common factors reduce them, it will make the question a  lot easier.

D – Difference of squares, a difference of squares is a bit different. It’s when we have two squares in the equation that subtract for example : x^2 – 81 would be (x + 9) (x – 9)

P – Patterns, patterns are pretty self explanitory but, what it is saying is to look for a pattern to more easily figure out an equation such as a trinomial equation. x^2 + x + b.

E – Easy, easy questions are question that will easily factor to add to the middle term or subtract and multiply into the last term.

U – Ugly, an ugly question is more difficult and can take more time. You may need to do different strategies because these questions can go into fractions.

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October 4

Week 4 in Precalc 11

This week in math 11 we learned about adding and subtracting radicals and we also learned how to multiply and divide.

this week we were not solving equations we were simplifying them. so when we had the equation 3 \sqrt {2} + 2 \sqrt {2} – 5 \sqrt {2} then we would simplify that to \sqrt {2}

the way I solved it was by using like terms.

adding and subtracting radicals is quite simple. It’s just combining like terms. so if we have 5 \sqrt {3} – 2 \sqrt {3}, we would get 3 \sqrt {3}.

 

 

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September 21

Week 3 in Precalc 11

This week in math 11 we learned about absolute values. A absolute value is always positive so if you have  |-6| then your answer would be 6.

In this example I have the equation \frac {|2 - (-8)|} {|3| - |-2|} so we know that 2 – (-8) would turn into 2 + 8 so our numerator would be 10. Then we would have |3| – |-2| since -2 is an absolute value it is changed into 2. then we have 3 – 2 = 1.

so our fraction is \frac {10} {1} = 10

.

Another example is |x^2 + 6x – 5|, x = 2

So if X = 2 then we know 2^2 = 4 and 6 x 2 = 12

|4 + 12 – 5|

4+ 12 = 16

16 – 5 = 11

= 11

 

 

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September 16

Week 2 in Precalc 11

This week in Math 11 we learned how to solve arithmetic sequences, to solve a arithmetic sequence you need to remember a simple equation : tn = a + (n – 1) d.

So if we have the sequence 7, 10, 13, 16… then d (common difference) would be 3. If we wanted to find term 8 we would need to use the equation. So it would be t_8 = 7 + (8 – 1) 3. which would be t_8 = 28.

 

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November 25

20% Project Updates..

October 14th – We managed to learn how to spell our names but we have not memorized it yet. We are using the ASL alphabet. I did not know there were other versions of sign language which I found pretty interesting. Also the way you count numbers are way different then how we would do them, in sign language the only use one hand and can count to 10.

October 28th – We learned how to say things such as “Hello” and “Brother / Sister” we also learned some other family signs I found it interesting how when ever you talked about a male you would use your forehead and if you talked about a female you used your chin. We have been watching YouTube videos by Bill Vicars. He makes great facial expressions and seems to be the best you can find to learn ASL.

November 11th – We learned some basic sentences such as “Hello my name is” and “How are you?” we found it challenging to say someone’s name while in a sentence because you have to spell out each and every letter. But what we also learned is that someone can give you a nickname so then your name could be one movement.

November 25th – We have started to work on what we are going to say in our film. Also  we are learning more sentences, more complex sentences. though, we were not able to speak in sign language to each other all the time like we expected. We are a bit behind what we had set for ourselves by today we were suppose to be talking to each other in sign language only, I guess sign language was more difficult than what we expected.

December 2nd –  Today, Ryan was away so Daniel and I decided to work on the video. My job today was to find some example presentations to see how they go. So then we can see in what format to put the video in. Meanwhile Daniel is working on typing out the script.

We have decided on a similar format but with speaking in it.

January 13th – We are  filming for the presentation  We hope all the effort and time we put into this will pay off in helping others. We’ve a lot of problems along the road. but our goal is  “always was to present how strongly communication is to people and what happens without it.”ASL is something we think 1 out of 3 people should understand. this is the final post and I still have to be filmed as the main character in our video.

Category: Grade 10, Programming 11 | LEAVE A COMMENT
October 14

20% Project

I am planing to learn sign language, my group members and I will be learning sign language and try and speak to each other without a problem. Why are we doing this? Well for me personally I have a cousin who has trouble speaking so he likes to use sign language. And I feel bad when I don’t know what he is saying or what he is talking about. So my goal is to first learn the alphabet then some words and hopefully talk or make signs in full sentences. I am looking forward to being able to technically speak another language.

Image result for ASL yay

(yay)

Category: Grade 10, Programming 11 | LEAVE A COMMENT