7th Grade Math NC Check In 1 Review

Flashcard
•
Mathematics
•
7th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the process to convert a decimal to a percent?
Back
To convert a decimal to a percent, multiply the decimal by 100 and add a percent sign (%). For example, 0.8 x 100 = 80%.
2.
FLASHCARD QUESTION
Front
How do you calculate 10% of a number?
Back
To calculate 10% of a number, multiply the number by 0.10. For example, 10% of 50 is 50 x 0.10 = 5.
3.
FLASHCARD QUESTION
Front
What is the constant of proportionality in a linear equation?
Back
The constant of proportionality is the ratio of the dependent variable to the independent variable in a proportional relationship, often represented as 'k' in the equation y = kx.
4.
FLASHCARD QUESTION
Front
How can you identify the constant of proportionality from a table of values?
Back
To identify the constant of proportionality from a table, divide the value of the dependent variable (y) by the value of the independent variable (x) for any pair of corresponding values. The result should be the same for all pairs.
5.
FLASHCARD QUESTION
Front
What is the formula to find the total cost after applying a discount and sales tax?
Back
Total Cost = (Original Price - Discount) + Sales Tax. First, calculate the discount, subtract it from the original price, then calculate the sales tax on the discounted price and add it.
6.
FLASHCARD QUESTION
Front
How do you calculate a percentage discount on an item?
Back
To calculate a percentage discount, multiply the original price by the discount percentage (as a decimal). For example, for a 15% discount on $79.99, calculate 79.99 x 0.15.
7.
FLASHCARD QUESTION
Front
What is the formula for calculating sales tax?
Back
Sales Tax = Price of Item x Sales Tax Rate. For example, if the price is $72.75 and the sales tax rate is 7%, then Sales Tax = 72.75 x 0.07.
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