1.3.3: Exercises

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Solve:
1. $\dfrac{2}{5}=\dfrac{6}{x}$
2. $\dfrac{2x}{9}=\dfrac{3}{10}$
3. $\dfrac{x}{12}=\dfrac{2}{3}$
4. $\dfrac{4}{9x}=\dfrac{10}{13}$
5. $\dfrac{n}{5}=\dfrac{16}{20}$.
Find a unit rate: You bought 10 pounds of potatoes for $4.
Find a unit rate: Joel ran 1500 meters in 4 minutes, 45 seconds.
Which is the more economical purchase: 32 oz of detergent for $6.29 or 48 oz of the same detergent for $8.29?
Solve the proportion.
1. $\dfrac{3}{25} =\dfrac{ x}{3000}$
2. $\dfrac{5}{8} = \dfrac{200}{x}$
A student scored 32 out of 40 on a practice exam and 12 out of 15 on the actual exam. Did the student do better on the practice exam or on the actual exam?
A soft drink is sold in a six-pack of plastic bottles holding 101.4 fl oz for $2.69. The same soft drink can be purchased in a 12-pack of cans containing 144 fl oz for $3.79. Which is the better buy?

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