Lesson 3-3 Example 4 3-3 Solve. COOKIES At the bakery there are boxes of cookies for sale. Two boxes contain 12 sugar cookies. If the bakery wants to sell.

Slides:

Advertisements

Similar presentations

If you know the ratio of students to teachers is 3 to 2 and you know there are 12 teachers, is there a way to figure out the number of students?

Advertisements

Lesson 1-3 Example Solve. BOOKS Khadijah’s book weighs 900 grams. How many milligrams does the book weigh? Understand Read the question. Write what.

Lesson 4-4 Example Solve. DRINKS It costs $3 per bottle of orange drink. Graph an equation to represent the cost of purchasing x bottles of orange.

Proportions  A proportion is an equation with a ratio on each side. It is a statement that two ratios are equal.  3 = 6 is an example of a proportion.

The cross products are equal, so the ratios are in proportion.

EXAMPLE 2 Using the Cross Products Property = 40.8 m Write original proportion. Cross products property Multiply. 6.8m 6.8 = Divide.

Writing and Solving Proportions. Proportions Proportion is an equation stating that two ratios are equivalent. Proportional are two quantities that form.

Using Cross Products Lesson 6-4. Cross Products When you have a proportion (two equal ratios), then you have equivalent cross products. Find the cross.

Finding a Percent of a Number Lesson 6-7. Using a Proportion Set up a proportion that uses the percent over 100. Cross multiply to write an equation.

Learn to write and solve proportions.

Solving Percent Problems Using Proportions

Lesson 1-1 Example Example 1 Karen bought a dress that cost $32. She paid 7% in sales tax. How much did she pay in tax? 1.Write the percent proportion.

Solving Rational Equations Lesson 11.8

Equivalent Forms of Rational Numbers

Holt CA Course Solving Inequalities by Multiplying or Dividing Preview of Grade 7 AF4.0 Students solve simple linear equations and inequalities.

The Percent Proportion Let’s start with what you know: What is the definition of a ratio? A ratio is a comparison of 2 or more numbers. What is a proportion?

Terms of Arithmetic Sequences

Warm up Lesson 3.1 Solve the following equations: 1. -5(3z + 7) = -8z 2. 3y + 12 = -(6 – 2y) 3. 8a = -4(5a + 7) 4. 10(3b – 1) = -2(b - 3) = z 2.

Proportions. Proportion – two equal ratios 1 = 4 3 = = 21 a = c 8 24 b d.

Ratio, Rate, Proportion, and Percent. Ratio  Comparison of two numbers by division  Can be written three different ways 4 to 9 4 :

Solving Rational Equations Section 7.5 beginning on page 392.

Solving Proportions. 2 ways to solve proportions 1. Equivalent fractions (Old) Cross Products (New)

Solving Percent Problems Using Proportions

Chapter 9: Lesson 4: Solving Percent Problems with Proportions

Chapter 10: Lesson 4: Solving Percent Problems with Proportions

Finding a Percent of a Number

Notes Over 11.1 Proportions Vocabulary Proportion - an equation that states that two ratios are equal. Cross Product Property - the product of the extremes.

Cross Products and Proportions

PROPORTIONS Objective:Learn how to solve proportions.

  A ratio is a way to compare two quantities that are measured in the same units by using division  45 : 100 Ratio.

Rational Numbers & Equations Lesson 3-5. Rational Numbers & Equations When given an equation with a fraction… a)Solve by multiplying by the reciprocal.

3.9 Proportions Goal to solve problems involving proportions.

Holt Algebra Percents 2-8 Percents Holt Algebra 1 Lesson Quiz Lesson Quiz Lesson Presentation Lesson Presentation Warm Up Warm Up.

Proportions How to Write and Solve Them. PROBLEM: I saw at Office Depot that pencils were priced at a dozen for $1.50 How much is it for one pencil? How.

Finding a Percent of a Number

Solving Equations With Fractions

Finding a Percent of a Number

A proportion is an equation that states two ratios are equal

Express in simplest form:

Lesson 85 Warm Up Pg. 441.

Equivalent Ratios Charts.

Proportions and Percent Equations

Lesson 5-1: Using Proportions

Solving Rational Equations

2-7 Solving Proportions.

Finding a Percent of a Number

9.6 Solving Rational Equations

Lesson 5.2 Proportions Students will be able use cross multiply to determine if the two ratios are equivalent.

Lesson 6.1 How do you find ratios and unit rates?

Warm Up Find the next two numbers in the pattern, using the simplest rule you can find. 1. 1, 5, 9, 13, , 50, 25, 12.5, , 87, 94,

Warm Up Multiply. –2 1. –3 2. –15 – (2.8) 0.14

Finding a Percent of a Number

Finding a Percent of a Number

Lesson 5-1 Using Proportions.

How do you use proportions to find unknown values?

Proportions Determine if the ratios can form a proportion. ,

8.5 Solving Rational Equations

Lesson 5-1: Using Proportions

8.5 Solving Rational Equations

Consumer Applications Review

Problem of the Day The last time you bought pizza, 3 pizzas were enough to feed 7 people. At that rate, how many pizzas should you buy for a party for.

Write a proportion that compares hours of work to pay.

Lesson 6 Ratio’s and Proportions

Solving Rational Equations

8.5 Solving Rational Equations

11-5 Solving Rational Equations

Using Cross Products Chapter 3.

Chapter Five: Ratios and Proportions

Presentation transcript:

Lesson 3-3 Example Solve. COOKIES At the bakery there are boxes of cookies for sale. Two boxes contain 12 sugar cookies. If the bakery wants to sell 20 boxes on Saturday, how many cookies will they have to bake? Understand Read the problem. Write what you know. There are 2 boxes with 12 cookies. You need to find out how many cookies need to be baked to fill 20 boxes.

Lesson 3-3 Example Plan Pick a strategy. One strategy is to write an equation. Let x represent the number of cookies that need to be baked to fill 20 boxes. Set up the proportion.

Lesson 3-3 Example Solve Cross multiply and solve. x = 120 The bakery must bake 120 cookies to fill 20 boxes. 2 ● x = 12 ● 20 2x= 240

Lesson 3-3 Example Check Compare the rations. In simplest form, both should be equal. Are the ratios equal?yes