1. ALGEBRA 1 HELP A brand of apple juice costs $1.56 for 48 oz. Find the unit rate. The unit rate is 3.25¢/oz. cost$1.56 ounces48 oz = $.0325/oz Quick Check Ratio and Proportion LESSON 2-4 Additional Examples

2. ALGEBRA 1 HELP Relate:Tour de France average speed equals295-km trip average speed In 2000, Lance Armstrong completed the 3630-km Tour de France course in 92.5 hours. Traveling at his average speed, how long would it take Lance Armstrong to ride 295 km? 3630 92.5 = 295 t 3630t = 92.5(295)Write cross products. t 7.5Simplify. Round to the nearest tenth. Traveling at his average speed, it would take Lance approximately 7.5 hours to cycle 295 km. t = Divide each side by 3630. 92.5(295) 3630 Define:Let t = time needed to ride 295 km. 3630 92.5 kilometers hours Write: = 295 t Ratio and Proportion LESSON 2-4 Additional Examples Quick Check

3. ALGEBRA 1 HELP The fastest recorded speed for an eastern gray kangaroo is 40 mi per hour. What is the kangaroo’s speed in feet per second? The kangaroo’s speed is about 58.7 ft/s. = 58.6 ft/sSimplify. 40 mi 1 h 5280 ft 1 mi 1 h 60 min 1 min 60 s Use appropriate conversion factors. 40 mi 1 h 5280 ft 1 mi 1 h 60 min 1 min 60 s Divide the common units. Ratio and Proportion LESSON 2-4 Additional Examples Quick Check

4. ALGEBRA 1 HELP Solve=. y3y3 3434 4y = 9Simplify. y = 2.25Simplify. 4y44y4 = 9494 Divide each side by 4. y3y3 12 = 3434 Multiply each side by the least common multiple of 3 and 4, which is 12. 12 Ratio and Proportion LESSON 2-4 Additional Examples Quick Check

5. ALGEBRA 1 HELP Use cross products to solve the proportion = –. w 4.5 6565 w 4.5 = – 6565 w(5) = (4.5)(–6)Write cross products. 5w = –27 Simplify. 5w55w5 = –27 5 Divide each side by 5. w = –5.4 Simplify. Ratio and Proportion LESSON 2-4 Additional Examples Quick Check

6. ALGEBRA 1 HELP Solve the proportion=. z + 3 4 z – 4 6 z + 3 4 z – 4 6 = (z + 3)(6) = 4(z – 4)Write cross products. 6z + 18 = 4z – 16Use the Distributive Property. 2z + 18 = –16Subtract 4z from each side. 2z = –34Subtract 18 from each side. z = –17Simplify. Divide each side by 2. = 2z22z2 –34 2 Ratio and Proportion LESSON 2-4 Additional Examples Quick Check