Find each rate. A. A Ferris wheel revolves 35 times in 105 minutes. How many minutes does 1 revolution take? by. Simplify.
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1 LESSON -2 Rates Lesson Objectives Find and compare unit rates, such as average speed and unit price Vocabulary rate (p. 218) unit rate (p. 218) Additional Examples Example 1 Find each rate. A. A Ferris wheel revolves 35 times in 105 minutes. How many minutes does 1 revolution take? minutes 1 revolution minutes revolutions minutes revolutions The Ferris wheel takes Write a rate that compares minutes and revolutions. by. minutes for 1 revolution. 100 Holt McDougal Mathematics
2 B. Sue walks yards and passes 2 security lights set along the sidewalk. How many security lights does she pass in 1 yard? lights yards lights yards Write a rate that compares lights and yards. by. lights 1 yard Sue walks past security lights in 1 yard. Example 2 Danielle is cycling 8 miles as a fundraising commitment. She wants to complete her ride in hours. What should be her average speed in miles per hour? miles Write the rate as a fraction. hours miles hours miles 1 hour by. Her average speed should be miles per hour. 101 Holt McDougal Mathematics
3 Example 3 A 12-ounce sports drink costs 0.99, and a 1-ounce drink costs Which size is the better buy? Divide the by the number of () to find the unit price of each size. Since, the - sports drink is the better buy. Check It Out! 1. Find the rate. A car gets 189 miles with 9 gallons of gas. How many miles does the car get in 1 gallon of gas? 2. Danielle is walking 18 miles for charity. She wants to complete her walk in 3 hours. What should be her average speed in miles per hour? 3. A 28-ounce box of cereal costs 2.99, and a 32-ounce box of cereal costs Which size is the better buy? 102 Holt McDougal Mathematics
4 LESSON -2 Rates Lesson Objectives Find and compare unit rates, such as average speed and unit price Vocabulary rate (p. 218) A ratio that compares two quantities measured in different units. unit rate (p. 218) A rate whose denominator is 1 when it is written as a fraction. Additional Examples Example 1 Find each rate. A. A Ferris wheel revolves 35 times in 105 minutes. How many minutes does 1 revolution take? minutes revolutions minutes 35 revolutions 35 Write a rate that compares minutes and revolutions. by minutes 1 revolution The Ferris wheel takes 3 minutes for 1 revolution. 100 Holt McDougal Mathematics
5 B. Sue walks yards and passes 2 security lights set along the sidewalk. How many security lights does she pass in 1 yard? 2 lights yards Write a rate that compares lights and yards. 2 lights yards by. lights 1 yard Sue walks past security lights in 1 yard. Example 2 Danielle is cycling 8 miles as a fundraising commitment. She wants to complete her ride in hours. What should be her average speed in miles per hour? 8 miles Write the rate as a fraction. hours 8 miles hours 17 miles 1 hour by the denominator. Her average speed should be 17 miles per hour. 101 Holt McDougal Mathematics
6 Example 3 A 12-ounce sports drink costs 0.99, and a 1-ounce drink costs Which size is the better buy? Divide the price by the number of ounces () to find the unit price of each size Since , the 1 - sports drink is the better buy. Check It Out! 1. Find the rate. A car gets 189 miles with 9 gallons of gas. How many miles does the car get in 1 gallon of gas? Danielle is walking 18 miles for charity. She wants to complete her walk in 3 hours. What should be her average speed in miles per hour? miles per hour 3. A 28-ounce box of cereal costs 2.99, and a 32-ounce box of cereal costs Which size is the better buy? the 32-ounce box 102 Holt McDougal Mathematics
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Warm Up 1. Find the x- and y-intercepts of 2x 5y = 20. Describe the correlation shown by the scatter plot. 2. Objectives Find rates of change and slopes. Relate a constant rate of change to the slope of
Cumulative Test. Name. Score. Show all work on this paper. Please use the Student Reference Guide.
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