Scale Factor Answers
When Nancy started middle school, she was 60 inches tall. When she started high school, she was 66 inches tall. What was the percent change in her height?
Jakob simplified the expression as shown. What was Jakob’s error in subtracting the expressions?
What is the sale price of a phone that was originally $199 but that has been marked down by 15 percent?
Simonne predicted that she would sell 99 picture frames. She actually sold 88 picture frames. What are the values of a and b in the table below? Round to the nearest tenth if necessary.Percent ErrorItemApproximate valueExact valueErrorAbsolute errorRatioPercent errorPicture frames9988 ab
What is the simplest form of the expression (–11.7y – 3.3x) + 1.2x + (5.2y + x)?
Which pair shows equivalent expressions?
Mike paid $18.00 before taxes for 5 photo albums. His sister wants to buy two of the same type of album. What amount should she expect to pay before taxes?
Mrs. Nygaard needs 12 hours to grade all of her students’ projects. She made a chart to show how much time she could spend grading the projects during the week.Project GradingDayHours GradingMondayTuesdayWednesdayThursday2FridayHow many hours will Mrs. Nygaard need to work over the weekend to finish grading the projects?
Use the diagram to solve. What is 135% of 280?PercentTotal100%5%5%5%5%5%5%5%135%
Paul drives his delivery van 675 miles in 3 days. At this rate, how far will he drive in 15 days?
Selina and three of her classmates each wrote out the steps for finding an approximate percent change. They all agreed on the first and fourth step: 1. Find the positive difference between the original number and the new number.2. ________________________3. ________________________4. Round the answer if necessary.They did not agree on steps 2 and 3. Which instructions are correct for steps 2 and 3?
A student has $78 in his checking account. If the student spends $12 on lunch, which number could be combined with the amount left in the account to make zero?
Kyoko is reading a book by her favorite author. She read the first 20 pages in of an hour. Reading at the same pace, Kyoko wants to determine if she’ll have enough time to finish the book before she has to go to bed.Reading TimeAccording to the graph, which statement must be true?
Which question can be represented by the expression?
Kedwin has $150.00 and wants to buy a new pair of headphones that cost $175.00 plus 10% shipping. He decides to wait until the headphones go on sale. What is the smallest sale rate that he needs to be able to afford them?
A car travels 18 miles per gallon of gas used. Which equation best represents the proportional relationship between the y miles that the car has traveled and the x gallons of gasoline that it has used?
A bookstore bought a case of 10 books at a wholesale price of $84. The bookstore will sell the books at a 25 percent markup, and each book will be sold for the same amount. How much will they sell each book in the case for?
A DVD player was marked down by 30 percent from its original price of $75. Including a 7 percent sales tax, what is the final cost of the DVD player?
This graph models the number of teachers assigned to a school, as determined by the number of students. What is the constant of proportionality?Number of Teachers
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