Objective Students will solve proportions Chapter 8, lesson 2 (8-2).

Slides:

Advertisements

Similar presentations

Lesson 6-8: Cross Multiplication

Advertisements

Example 3 Each day, an elephant eats 5 pounds of food for every 100 pounds of its body weight. How much does a 9300 pound elephant eat per day? SOLUTION.

4-1 Ratios & Proportions.

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.

EXAMPLE 4 Solve proportions SOLUTION a x 16 = Multiply. Divide each side by 10. a x 16 = = 10 x5 16 = 10 x80 = x8 Write original proportion.

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

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.

+ Cross Multiplication Objective: We will learn to use cross multiplication to solve a proportion. We will use cross multiplication to check whether two.

How do I solve a proportion?

Over Lesson 7–3 Determine whether the triangles are similar. Justify your answer. Determine whether the triangles are similar. Justify your answer. Determine.

8-3 6 th grade math Solving Proportions Using Cross Products.

1 ratios 9C5 - 9C6 tell how one number is related to another. may be written as A:B, or A/B, or A to B. compare quantities of the same units of measurement.

1 Math Solving Proportions. 2 Vocabulary ► Proportion—an equation that shows that two ratios are equivalent. ► Cross Product—the product of the numerator.

Splash Screen. Over Lesson 7–2 5-Minute Check 1 Over Lesson 7–2 5-Minute Check 2.

5-3 Solving Proportions Warm Up Problem of the Day Lesson Presentation

When two pairs of numbers such as (3, 2 and 6, 4) have the same ratio, we say that they are proportional. The equation states that the pairs 3, 2 and 6,

Using Proportions Lesson 4-1. Ratio: The comparison of two numbers (written in Algebra as a fraction) Proportion: When two ratios are equal to each other.

Transparency 3 Click the mouse button or press the Space Bar to display the answers.

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

1. What Are You Learning? I CAN solve proportions. 2.

Solving Percent Problems Using Proportions

Chapter 9: Lesson 4: Solving Percent Problems with Proportions

Chapter 10: Lesson 4: Solving Percent Problems with Proportions

Jeopardy Solving Equations Add and Subtract Multiply and Divide Multi-Step Variables on each side Grouping Symbols $100 $200 $300 $400 $500 $100 $200.

PROPORTIONS 6-2. VOCABULARY Proportion – equality of two ratios Cross Products – the results when you cross multiply.

Cross Products and Proportions

PROPORTIONS Objective:Learn how to solve proportions.

Solving a System of Equations by Elimination SYSTEMS1.2- I can solve a system of equation by elimination.

Example 2 Hair Growth Human hair grows about 0.7 centimeter in 2 weeks. How long does hair take to grow 14 centimeters? Writing and Solving a Proportion.

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.

Jeopardy Solving Equations

Lesson 4-1 Solving linear system of equations by graphing

Finding Proportions using Cross Multiplication

Ratios and Proportions

Solving Linear Equations and Inequalities

Click the mouse button or press the Space Bar to display the answers.

7.6 ESSENTIAL QUESTION How do you identify and draw dilations?

A proportion is an equation that states two ratios are equal

Lesson 85 Warm Up Pg. 441.

Students will solve two step equations (12-4).

SOLVING EQUATIONS, INEQUALITIES, AND ALGEBRAIC PROPORTIONS

6.3 Solving Proportions Using Cross Products

Algebra Bell-work 9/1/17 1.) 3x – 3 – x = 2x – 3 2.) 3x – 7 = 3x + 5

Finding a Percent of a Number

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

Write and Solve Proportions

6.2 Proportions.

Solving Proportions.

Lesson 3.1 How do you solve one-step equations using subtraction, addition, division, and multiplication? Solve one-step equations by using inverse operations.

Write and Solve Proportions

Proportions Determine if the ratios can form a proportion. , b. a.

Objective: Understand what proportions are, setting the up and solving

Solving Proportions.

Equations – Success if you can do these

Solving Multiplication Equations

The Percent Proportion

How do I solve a proportion?

TWO STEP EQUATIONS 1. SOLVE FOR X 2. DO THE ADDITION STEP FIRST

Solving Percent Problems Using Proportions

Learn to solve equations with integers.

Equations – Success if you can do these

Write a proportion that compares hours of work to pay.

Lesson 6 Ratio’s and Proportions

Finding Proportions using Cross Multiplication

Chapter Five: Ratios and Proportions

EXAMPLE 4 Solve proportions Solve the proportion. ALGEBRA a x 16

Using Cross Products Chapter 3.

Chapter Five: Ratios and Proportions

Presentation transcript:

Objective Students will solve proportions Chapter 8, lesson 2 (8-2).

Vocabulary: Proportion Cross products

Steps: To determine whether each pair of ratios form a proportion you must do the following: * Cross multiply (N with D). * If products are =, they form a proportion. * Write final answer after showing all work.

Example: 2/13, 4/26 (problem) 13 x 4 = 26 x 2 (cross X) 52 = 52 (look at answers) yes, it forms a proportion

Steps continued: To solve each proportion, you must do the following: * Cross multiply (N with D) * Solve for the variable (letter) by dividing both sides by the # in front of the letter. * Write the final answer as Z = (letter = answer).

Example: 5/9 = w/54 (problem) 9 x W = 54 x 5 (cross M) 9W = 270 9w/9 = 270/9 (divide both sides by 9) W = 30 (answer)