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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.

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Presentation on theme: "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."— Presentation transcript:

1 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 x0.7 = 142 Cross products property 0.7x = 28 Multiply. 0.7 0.7x 0.7 28 = Divide each side by 0.7. SOLUTION 2 0.7 x 14 = Length of hair grown Number of weeks

2 Example 2 Writing and Solving a Proportion x = 40 Simplify. ANSWER Hair takes about 40 weeks to grow 14 centimeters.

3 ANSWER 7 72 ANSWER 42 ANSWER 270 Use the cross products property to solve the proportion. Checkpoint 5. = 42 18 t 3 8. 6 0.4 = z 18 6. p 16 45 10 = 7. 7 1.5 b 9 =

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