Math+B

= Tim Holm = = Class of 2016 = ** Kevin Leon, Dezirae Gomez , Trevor McLeod **
 * Math B**

= chp. 8 - Solving Equations p.246 = = **Lesson 8-1**: Equations and Variables Page 248 = The given set of numbers that a variable may represent is called the __**replacement set.**__ The numbers have to be put in braces, { }. ex. X = 2, 4, 6, 8, turns into X = {2, 4, 6, 8}fv toc __**Practice:**__ 4 + 1n = 5; {0, 1, 2, 3)

20 - 3y = 2; {4, 6, 8, 10} = **Lesson 8-2**: Equations: Addition and Subtraction Page 251 = These simple Equations involve two whole numbers and a variable. EX. [3+5=x or 5-x=2]

= **Lesson 8-3**: Equations: Multiplication and Division Page 255 =

These are a little more complicated, but is still very simple. EX.[3x=24 or 24\n=3] = **Lesson 8-4**: Equations: Decimals and Fractions Page 257 = Sometimes an equation can contain decimals. EX.[.42x=105 or n/.5=5 = **Lesson 8-5**: Combined Operations Page 260 = TWO step equations EX[.5x2-1=0] = **Lesson 8-6**: Word Sentences and Equations Page 264 = If you are having trouble with this lesson this video link will help you.

http://youtu.be/JDmmRVUKQww

= **Lesson 8-7**: Translating Problems into Equations Page 267 = When doing this you make equations from a word problem. Ex. (The perimeter of an isosceles Triangle is 40. What is the length of the other two congruent side if the third is 14?) L+L+14=40 L=13 = **Lesson 8-8**: A Problem Solving Model: Writing Equations Page 270 = __ //** hhhhh **//** Solving a Word Problem Using an Equation ** __ Step 1: Read the problem carefully. Make sure that you understand what it says. You may need hhhhhhhhhh to read it more than once. Step 2: Decide what numbers are asked for. Choose a variable and use it with the given conditions of   hhhhhhhhhh the problem to represent the number(s) asked for. Step 3: Write an equation based on the given conditions. Step 4: Solve the equation and find the required numbers. Step 5: Check your results with the words of the problem. Give the answer.

= chp. 9 - Percents p.280 ﻿ = *All answers to the practice problems in this chapter are on the page next to the title. = **Lesson 9-1**: Percents and Fractions Page282 = When you compare fractions use 100 as the denominator 17/25= 68/100 7/10= 70/100
 * Al formulas are black!!

Percent= the ratio of a # to 100 Express seven and one-half precent as a fraction. Write 250% as a mixed number in simple form
 * Practice: **

= **Lesson 9-2**: Percents and Decimals Page 286 = Rules: Practice: Express each percent as a decimal 83.5% 450%  Express each decimal as a percent 10.5 0.00062
 * 1) To express a percent as a decimal, move the decimal point two places to the left and remove the % sign.
 * 2) To express a decimal as a percent, move the decimal point to places to the right and add the % sign.

= **Lesson 9-3**: Computing with Percents Page 289 = There is one simple formula to help you compute percents part= percent x whole or part = %x whole Practice: What number is 8% of 75? What % of 40 is 6?

= **Lesson 9-4**: Percents of Increase and Decrease Page 292 = To find the amount of change in the price, we subtract by the original price and express the result as a percent. $260 - $280 = $52 To find the percent of change in the price divide the amount of change by the original price and express the result as a percent. 52/260= 0.20= 20% Formulas: percent of change= amount of change/original amount amount of change= percent of change x original amount Practice: 20 to 24 Find the new number when 75 is decreased by 26% = **Lesson 9-5**: Discount and Markup = Discount- decrease of the price of an item Markup- increase in the price of an item

= **Lesson 9-6**: Commission and Profit = These are the formulas amount if commission= percent of commission x total sales profit= total income-total costs percent of profit= profit/total income

practice page 300 in book

= **Lesson 9-7**: Simple Interest = interest = principal x rate x time Practice: Page 303

= **Lesson 9-8**: Compound Interest = I-Prt Practice Page 308

= chp. 10 - Areas and Volumes p.318 ﻿ =

= **Lesson 10-1: Area of Rectangles and Parallelograms** = rectangle = length x width (a=lw) parallelogram = base x height (a=bh)

links below are for the demonstration of area = [|area_of_rectangle.png] =

= **Lesson 10-2: Area of Triangles and Trapezoids** = triangles = .5 x base x height (a=b x h x .5) trapezoid = base 1 + base 2 x height x .5 (a = .5 x (b1 + b2) x height)

= ** [|area_of_trapezoid_and_triangle.png] ** =

= **Lesson 10-3: Area of Circles** = circles = pi x (radius 2 ﻿)

**[|area_of_circle.png]**

= **Lesson 10-4: Using Symmetry to Find Area** =

**[|symmetry.png]**

= **Lesson 10-5: Polyhedrons** =

**[|polyhedron.png]**

= **Lesson 10-6: Volume of Prisms** = prisms = Base area x height (V=B x H)

**[|volume_of_prism.png]**

= **Lesson 10-7: Volumes of Cylinders** = cylinders = Base area x height (V = Bh or V = pi x radius 2 ﻿ x h)


 * [|volume_of_cylinder.png] **

= **Lesson 10-8: The Mass of an Object** = = **Lesson 10-9: Surface Area** =

**[|surface_area.png]**

Cylinder lateral surface area = 2 * pi * //rh//

Total surface area = 2 * pi * //rh + 2 * pi * r 2 //


 * [|surface_area_of_cylinder.png] **

= chp. 11 - Integers and Graphs p.364 ﻿﻿ = = **Lesson 11-1**: Negative Numbers = = **Lesson 11-2**: Adding Integers =

=** Lesson 11-3: ** Subtracting Integers = = **Lesson 11-4:** Products with One Negative Integer and Lesson 11-5 Products with Multiple Negative Integers = When it comes to multiplying negative integers there are just simple things you have to know. A positive x a positive is a **positive** A negative x a positive is a **negative** A positive x a negative is a **negative** And remember anything x zero is **zero** Examples: (-1 x 4)5 -4 x 5 **-20** Practice: 16 x -4 -2 x -5 -8(7+-15)

= **Lesson 11-6:** Quotients with Integers = Division of negative integers has the same rules has multiplying with negative integers. Examples: 15/-3 -5 = **Lesson 11-7:** Solving Equations =

= **Lesson 11-8:** Graphs of Ordered Pairs =


 * [|graphing_ordered_pairs.png] **

= **Lesson 11-9:** Graphs of Equations =

**[|graphing_equations.png]**

=More Practice Help:= [|www.yourteacher.com] Username: chinquapin Password: yourteacher Their are also reviews at the end of each chapter and Self Test you can use to practice. Sources: //Mathematics: Structure and Method "McDougal Littell/ Houghton Mifflin"//
 * click on Pre- Algebra and whatever you need help on

 If you want in person in help go on Wednesday to Tim’s tutorials. He will announce during class if he is having tutorials or not.

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