1. copyright©amberpasillas2010 Go Math Lesson 7.2A

2. copyright©amberpasillas2010 7 3 = Put your remainder over the denominator.

3. copyright©amberpasillas2010 9 2 = Put your remainder over the denominator.

4. copyright©amberpasillas2010 Two numbers are reciprocals if their product is one.

5. copyright©amberpasillas2010 Two numbers are reciprocals if their product is one.

6. copyright©amberpasillas2010 Hint to find a reciprocal: JUST FLIP THE FRACTION OVER!

7. copyright©amberpasillas2010 Write the reciprocal of. 3 2 To write the reciprocal of, switch the numerator and denominator. 3 2 3 2 2 3 CHECK 3 2 2 3 6 6 == 1

8. copyright©amberpasillas2010 Write the reciprocal of the number. 2. 11 4 3. 7 2 ANSWER 5 6 1. 6 5 ANSWER 4 11 ANSWER 2 7 4. 5 8 ANSWER 8 5

9. copyright©amberpasillas2010 LCM

10. copyright©amberpasillas2010 Solve 7/10n + 3/2 = 3/5n + 2 Step 1: Determine Least Common Multiple. (10) Step 2: Multiple all terms by 10. Step 3: Subtract 15 and 6n from both sides.

11. copyright©amberpasillas2010 Solve 1/7k – 6 = 3/7k + 4 A: k = - 35

12. copyright©amberpasillas2010 Solve 5/6y + 1 = -1/2y + ¼ A: y = -9/16

13. copyright©amberpasillas2010 Example 2 J avier walks from his house to the zoo at a constant rate. After walking 0.75 mile, he meets his brother and they continue walking. When they arrive at the zoo, Javier has walked for 0.5 hour and Raul has walked for 0.2 What is the rate in miles per hour? 0.2r + 0.75 = 0.5r Multiply by 100 20r + 75 = 50r Subtract 20r 75 = 30r Divide by 30 R = 2.5

14. copyright©amberpasillas2010 Your Turn #5 Logan has two aquariums. One aquarium contains 1.3 cubic feet of water and the other 1.9 cubic feet. The water in the larger aquarium weighs 37.44 pounds more than the water in the smaller one. Find the weight of 1 cubic feet of water. 1.9x = 1.3x + 37.44.6x = 37.44 X = 62.4 lbs