Operations on Rational and Irrational Numbers — Unit test Answers

Justin is evaluating the expression , when is 7.9. What was Justin’s error?

Noa buys 6 items that each cost $4.25 and 3 items that each cost $6.75. How much does Noa spend in total?

Which number expresses 6.72 as a fraction in simplest form?

Lola needs to sign 96 invitations. Using a stopwatch that measures time to tenths of a second, it takes Lola 5.3 seconds to sign her full name. Going by the accuracy of the stopwatch, which is the most accurate determination for the number of seconds Lola needs to sign all 96 invitations?

Which of the following repeating decimals is equivalent to ?

At a grocery store, blueberries come packaged in 8-ounce containers for $2.80. At a farmer's market, blueberries cost $4.20 for 14 ounces. There are 16 ounces in one pound. Which statement accurately compares the cost of blueberries?

Which of the following is always irrational?

Nicole is trying to determine an algebraic expression to represent the amount of dog biscuits she needs to purchase for a dog show. She does not know how many dogs will attend the event but wants to have 2 biscuits per dog plus an additional 35 dog biscuits. If d represents the number of dogs, which expression represents the number of dog biscuits Nicole will need for the event?

Use the number line to answer the question. Which statement about graphing rational numbers is true?

Miguel wants to bike a total of 100 miles over the course of one week in the summer. He logs how much he bikes each day in the table below.Miguel’s Biking LogDayMiles CompletedMonday16.3TuesdayWednesday18.75ThursdayFridayHow many total miles does Miguel need to ride on Saturday and Sunday to meet his goal?

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What is the simplified value of the expression below?

Which operation means “split evenly”?

A sign language club made $627.50 from selling popcorn at a festival. The popcorn cost the club $95.00. Which expression represents the amount of money that was raised for each member of the club? (Let the variable m be the number of members in the club.)

Sam is determining the area of a triangle. In this triangle, the value for the height is a terminating decimal, and the value for the base is a repeating decimal. What can be concluded about the area of this triangle?

Which number is rational?

Shalina wants to write as a decimal. Which method could she use?

The area of a rhombus can be evaluated using the formula , where d1 represents the measure of one of its diagonals and d2 represents the measure of its other diagonal. When d1 is a terminating decimal and d2 is a repeating decimal, what can be concluded about the area of the rhombus?