The Mean

What is a Mean?

Mean- is a measurement of central tendency.
- the sum ( answer of addition) of a set of values divided by the number of values in a set or to put in a simple way, add all the numbers given and divide in how many you've add.
- AKA. Getting the average

eg. 4,5,8,99

= 4+5+8+9+9
__________
5
= 35
___
5

= 7

Try This:

A) 7,8,6,9,9,5,7,7,8,4
B) 300,250,400,300,250

The meaning of mean

Mean - a measure of central tendency - sum (adding) of a set of values divided by the numbers of value in the set.
eg.; 4, 5, 8, 9, 9













a.k.a ; average

To refresh your memory:
Mode means the most frequently occurring number in a set of data.
Median means the middle number in a set of data after the data has be arranger or reordered.

Try these (Find mode, median and mean):
a) 4, 5, 6, 7, 7, 7, 8, 8, 9, 9
b) 250, 250, 300, 300, 400

Compare your answers to these:
a) mode = 7 median = 7 mean = 7
b) mode = 250 & 300 median = 300 mean = 300

Homework: Math Links; Page-431, 433 #1-16

Here are some videos:









PS: KC chiefs & Isfeld are the best :D !
Beat that stand up boy ;)

Homework and extra practice

Your homework for the weekend is pages 426 - 427 numbers 1 - 17 plus the math link.

Try some of these problems for extra practice:

Working With Data1. List all the four-digit numbers that are even, have a 6 in the tens place, and whose digits add to 12. 2. Is 349 ´ 0.9 greater than, less than, or equal to 349? How do you know? ______________________________________________________________ ______________________________________________________________
3. Suppose you know that 48 ÷ 16 = 3. Without finding the exact answer, tell whether the answer to 48 ÷ 15.99 is greater than, less than, or equal to 3. Why? ______________________________________________________________ ______________________________________________________________
4. Use the multiplication below to answer the questions that follow. a) Can E be 2? Explain. ___________________________________________________________ ___________________________________________________________ b) What is the value of D? Why? ___________________________________________________________ ___________________________________________________________ c) What is the value of G? How do you know? ___________________________________________________________ ___________________________________________________________

Algebra, T - Chart, and Linear Graph

skip to main | skip to sideba

1.) This diagram shows that a cabin with 1 room has 2 doors,

a cabin with 2 rooms has 5 doors, and a cabin with 3 rooms

has 8 doors.

Draw the next 2 cabins.

How many doors will a cabin with 10 rooms have?

~ 29 DOORS

Write an algebraic equation for this pattern.

~ 3x - 1 = y

2.) For this linear relationship y = 2x - 1. Complete

the following table of values.

Create a graph representing these values.

Describe a pattern in real life that the linear relation

y = 2x - 1 could represent. Make sure you explain what

both x and y represent.

eg.

There's a bag of chip that costs $2.00. I bought 2 bags of chip

(let's just say I bought 2 bags). I multiplied it by 2.

Then I remembered I have a coupon worth $1.00 off.

3 = 2(2) -1

HERE ARE SOME VIDEOS TO HELP YOU!

(Sorry guys, I can't put the video directly to this post.

The computer said it's an error page.)

http://www.youtube.com/watch?v=W7fPsSw74TM

http://www.youtube.com/watch?v=VMZ9Zy6q6Iw&feature=related

http://www.youtube.com/watch?v=VAJRj8hST1c

SOLVE FOR HOMEWORK!

a.) 10 = x + 6 b.) x + 6 = 8 c.) x - 2 = 9 d.) x - 4 = 5

e.) 2x + 1 = 7 f.) 4x - 2 = 12 g.) x / 4 + 3 = 9 h.) x / 6 - 5 = 1

Solving Two-Step Algebraic Equations

Dude pays $19 for 2 t-shirts and a pair of sunglasses. How much does dude pay for each t-shirt?
1.2t + 3=$19
If the sunglasses cost $7 how much are the t-shirts?
2t + 7 =$19
-7 -7
2t + 12
─ ─
2 2
t=6

Check answer:
2(6) +7 = 19
12 +7=19
19+19

Chick saw a sign ,buy two pants and get socks for 4 pairs of socks. If she pays $30 for 2 pants and 4 socks.What is the price of a pair of pants?
Model using blocks on a scale




For short:
2p + 8 = 30
-8 -8
2p + 22
─ ─
2 2
p= 11

Check your answer:
2p+8= 30
2(11) +8+30
22 + 8 = 30
30=30



Now try these:
3w+ 3 =6 2n +4= 10
-3 -3 -4 -4
3w +3 2n = 6
─ ─ ─ ─
3 3 2 2
w = 1 n = 3

To enhance your learning, watch this video!

Embed video for thunder boy.

Here is a video. Enjoy thunder boy.

Solving One Step Algebra Equations

Apply the opposite equation

a+5=7 Step one, isolate the variable

-5 -5 Step two, apply the opposite integer

a=2

a+5=7 The third and final step is to check your answer.

2+5=7

7=7

Easy isn't it? Now that you've learned how to do this, try these questions:

1)b+3=5

2) c/3=7

3)4d=16

Stuck? Well, here are the answers!

HOMEWORK: Pg. 405-407 (questions 1-21)

(text book available here)

If I didn't help, please refer to these videos:

One Step Algebra Equations - Division

One Step Algebra Equations - Multiplication

One Step Algebra Equations - Addition

One Step Algebra Equations - Subtraction

or check this game out:

http://www.mathsnet.net/algebra/l1_equation.html

Thank you for reading my scribe! Please remember to comment below.