Rewriting Expressions
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Donovan eats 2 granola bars and drinks 1 glass of orange juice for breakfast every day. The price of a granola bar is B dollars and the price of a glass of orange juice is J dollars. The expression 7(2B + J) describes how much Donovan spends on breakfast in one week. Match each amount in the situation with the expression that represents it.
4 points
7(2B + J)
7
2B
J
Amount Donovan spends on granola bars each day.
Amount Donovan spends on breakfast each day.
Amount Donovan spends on juice each day.
Number of days Donovan buys breakfast.
Chad bought a watch that normally costs w dollars. He used a 30% discount coupon. The expression 0.7w describes the amount of money Chad paid for the watch. We can also use the expression w - 0.3w to represent the same quantity. Match each amount in the situation with the expression that represents it.
4 points
0.3w
w
0.3
0.7
Amount the watch normally costs
Amount of the discount
Percent decrease of the discount, as a decimal
Percent of the normal cost that Chad paid, as a decimal
Nadeen is at an arcade. She started with 18 tokens. Each game costs 3 tokens. So far, Nadeen has played x games. Which expressions can we use to describe how many tokens Nadeen has left? Choose 2 answers.
1 point
A school charges $6 per ticket to a dance. They spend $300 on music and decorations. The expression 6n -300 describes the amount of profit the school makes from the dance if n students buy tickets. What does 6n represent in this context?
1 point
Clear selection
A single ticket to the magic show costs t dollars, but there is a discount of 5% per ticket if a group buys 10 tickets. The expression 10t - 10 x .05t describes the total cost of buying 10 tickets for a group. Match each amount in the situation with the expression that represents it.
4 points
10
10 x .05t
.05t
10t
Total discount for 10 group tickets
Amount of discount per ticket
Number of tickets
Cost of buying 10 single tickets
Ariane feeds her kitten k grams of food 2 times in the morning and 2 times in the evening. She feeds her dog d grams of food 1 time in the morning and 1 time in the evening. Which expressions can we use to describe how many grams of food Ariane feeds her animals per day? Choose 2 answers.
1 point
Clear selection
Edgar ran e meters per second, and Mathieu ran m meters per second. The boys ran for t seconds. The expression t(m - e) describes how many more meters Mathieu ran than Edgar ran during that time. We can also use the expression tm - te to represent the same quantity. Match each amount in the situation with the expression that represents it.
4 points
t
tm
m - e
te
Total number of meters Edgar ran
Total number of meters Mathieu ran
How many more meters Mathieu ran than Edgar per second
Number of seconds the boys ran
A robin flew r meters per second, and a cardinal flew c meters per second. The birds flew for t seconds. The expression t(r - c) describes how many more meters the robin flew than the cardinal flew during that time. What does (r - c) represent in this context?
1 point
Clear selection
Jasmijn is a pet groomer. She charges n dollars to clip a dog's nails, w dollars to wash the dog, and h dollars to cut a dog's hair. Jasmijn will perform all three services for each of the 4 dogs she needs to groom this weekend. Which expressions can we use to describe how much Jasmijn will charge for grooming all 4 dogs? Choose 2 answers:
1 point
On Thursday, r centimeters of rain fell on Deborah's garden. On Saturday, 15% more rain fell on the garden. The expression r + 0.15r describes the number of centimeters of rain Deborah's garden got on Saturday. We can also use the expression 1.15r to represent the same quantity. Match each amount in the situation with the expression that represents it.
3 points
r
1.15r
0.15r
The centimeters of rain on Thursday
How many more centimeters of rain fell on Saturday than on Thursday
The centimeters of rain on Saturday
Camilla borrows a book from the library for d days. The library charges a late fee of 0.10 dollars per day that the book is late. If Camilla returns the book more than 21 days after she borrowed it, the expression 0.10(d − 21) represents the total late fee Camilla owes. What does (d−21) represent in this context?
1 point
Clear selection
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