ratios and proportions

S o l v e space 9 over 5 equals 3 over x

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$fraction numerator y plus 7 over denominator 9 end fraction equals 8 over 5 f o r space y.$

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If a over b equals 3 over 4 , which other proportion must be true?

b over a equals 4 over 3

$fraction numerator a plus b over denominator b end fraction equals fraction numerator 3 plus b over denominator 4 end fraction$

b over a equals 3 over 4

a over b equals 4 over 3

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If a over b equals 3 over 4 , which other proportion must be true?

$fraction numerator a plus b over denominator b end fraction equals fraction numerator 3 plus b over denominator 4 end fraction$

$fraction numerator a plus b over denominator b end fraction equals fraction numerator 3 plus a over denominator 4 end fraction$

$fraction numerator a plus b over denominator b end fraction equals 7 over 4$

$fraction numerator a plus b over denominator b end fraction equals fraction numerator 3 plus a over denominator 4 plus b end fraction$

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The measures of two complementary angles are in the ratio 2:3. What is the measure of the smaller angle?

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The measures of two supplementary angles are in the ratio 4:11. What is the measure of the larger angle?

132

115

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The extremes of a proportion are 4 and 14. Which of the following pairs could be the means of the proportion?

2 and 28

5 and 11

6 and 9

7 and 8

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