ratios and proportions

Flashcard
•
Mathematics
•
7th 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 by division, showing how many times one value contains or is contained within the other.
2.
FLASHCARD QUESTION
Front
What is a proportion?
Back
A proportion is an equation that states that two ratios are equal.
3.
FLASHCARD QUESTION
Front
How do you find the price per gallon if you know the total cost and the number of gallons?
Back
Divide the total cost by the number of gallons. For example, if it costs $46.80 for 13 gallons, the price per gallon is $46.80 ÷ 13 = $3.60.
4.
FLASHCARD QUESTION
Front
What does it mean for two quantities to be proportional?
Back
Two quantities are proportional if they maintain a constant ratio or rate.
5.
FLASHCARD QUESTION
Front
How can you determine if a table shows a proportional relationship?
Back
Check if the ratios of corresponding values are equal. If they are not, the relationship is nonproportional.
6.
FLASHCARD QUESTION
Front
What is the formula for solving a proportion?
Back
Cross-multiply the two ratios and set them equal to each other. For example, if a/b = c/d, then a*d = b*c.
7.
FLASHCARD QUESTION
Front
What is the ratio of STARS to SQUARES if there are 3 STARS and 4 SQUARES?
Back
The ratio of STARS to SQUARES is 3 to 4.
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