Tsumiki
03.11.2020 •
Mathematics
Jada mixes milk and cocoa powder to make hot chocolate. She wants to use all the cocoa powder she has left. How much milk should Jada use?
Data Card 1
One batch of Jada’s recipe calls for 3 cups of milk.
One batch of Jada’s recipe calls for 2 tablespoons of cocoa powder.
Jada has 2 gallons of milk left.
Jada has 9 tablespoons of cocoa powder left.
There are 16 cups in 1 gallon.
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Ответ:
C(x) = 6x + 3 (in USD)
Further explanationGiven:
The fee to rent is $3 for the day.Gillian rented skates and skated for 3 hours and was charged $21.Question:
The equation that represents cost, C(x), ice skating as a function of x, the number of hours of skating.
The Process:
We try solving a word problem about the single variable equation.
Step-1: calculate the cost of skates per hour.
Let the rate of using the skating rink be R per hour. We will seek the value of R.
On that day Gillian rented skating for 3 hours and paid $ 21. The equation that will determine this given by:
Both sides subtracted by 3.
We isolate R on the left side. Both sides are divided by 3.
Hence, the fee of skates per hour is
Step-2: determine the cost equation for ice skating
Let x as the number of hours of skating.
Recall the fee of skates per hour is $6 and the fee to rent is $3 for the day.
Thus, the equation which represents the cost of ice skating as a function of x, the number of hours of skating, will be given by:
(in USD)
Learn moreHow much (in US dollars) will you spend on fuel on your trip? Gasoline efficiency in Europe Which expression represents the amount of change Huang should receive?Keywords: the ice skating rink, charges an hourly fee, Gillian rented skates, the equation represents the cost, C(x), a function of x, the number of hours of skating, a word problem, the single variable equation