Ratio and Proportions

Flashcard
•
Mathematics
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a Ratio?
Back
A ratio is a comparison of two quantities.
2.
FLASHCARD QUESTION
Front
How do you calculate the price per gallon if you paid $15.00 for 6 gallons of gasoline?
Back
Price per gallon = Total cost / Number of gallons = $15.00 / 6 = $2.50.
3.
FLASHCARD QUESTION
Front
What is the ratio of red toy cars to all toy cars if Patrick has 2 black, 3 red, and 5 white toy cars?
Back
The total number of toy cars = 2 + 3 + 5 = 10. The ratio of red toy cars to all toy cars = 3:10.
4.
FLASHCARD QUESTION
Front
If a cake recipe calls for 1.5 cups of milk and 3 cups of flour, how much milk is needed if 5 cups of flour are used?
Back
To keep the proportions correct, use 2.5 cups of milk.
5.
FLASHCARD QUESTION
Front
Do the ratios 1:2 and 2:4 form a proportion?
Back
No, they do not form a proportion because 1/2 is not equal to 2/4.
6.
FLASHCARD QUESTION
Front
What is a proportion?
Back
A proportion is an equation that states that two ratios are equal.
7.
FLASHCARD QUESTION
Front
If 3/4 of a recipe requires 2 cups of sugar, how much sugar is needed for the whole recipe?
Back
For the whole recipe, you need 2 cups / (3/4) = 2 * (4/3) = 8/3 cups or approximately 2.67 cups.
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