



Use direct proportion between distance and time.
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tỷ số và tỷ lệ 2in1
- Converting Between Percentages, Ratios, and Fractions
- What equality does a proportion express?
- Explain the method of solving mixture problems involving percentages. A gold alloy contains gold and copper in the ratio 7 3. If the weight of gold in the alloy is 21 grams, what is the weight of copper and the total weight of the alloy?
- How can you determine if two ratios form a proportion? What are equivalent ratios?
- Test Your Understanding of Ratios and Proportions Problem 1 Simplify the ratio 24 36.
- Explain how the change in speed affects the time taken. Two numbers are such that their ratio is 3 5. If 10 is added to each number, the ratio becomes 5 7. Find the original numbers.
- How are these ratios used for analysis? How are ratios used in cartography (mapmaking)?
- How do you determine if two triangles are similar? If two triangles are similar, and the ratio of their corresponding sides is 2 3, what is the ratio of their areas?
- Explain the direct relationship between distance and speed when time is constant.
- Explain how to handle multi-component mixture problems.
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