7-1 Ratios and Proportions

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7.1 Ratios and Proportions

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Presentation transcript:

7-1 Ratios and Proportions Vocab: Ratio: a comparison of 2 quantities using division Extended Ratios: Comparing 3 or more quantities Proportion: An equation stating 2 ratios are equal Cross Products: The products of cross multiplying ratios

Writing and Simplifying Ratios Ex 1: A baseball player’s batting average is the ratio of number of hits to the number of at bats. In 2015, Bryce Harper had 172 hits in 521 at bats. What was his batting average?

Extended Ratio Ex 2: The ratio of the measures of the angles of a triangle is 3:4:5. Find the measures of the angles.

Solving Proportions Ex 3: 7 10 = 21 𝑥 Ex 4: 15 3 = 𝑥 − 3 5 Ex 5: Fernando conducted a survey of 50 students driving to school and found 28 owned cars. If 755 students drive to school, predict the total that own cars.

Classwork/Homework P. 464 2-30 even