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Alla [95]
2 years ago
7

At Micaela's Printing Company LLC there are two kinds of penting presses: Model A which can print 60 books per day and Model B w

hich can print 30 books per day. The company owns 15 total printing presses and this allows them to print 600 books per day. How many of each type of press do they have?
Mathematics
1 answer:
devlian [24]2 years ago
8 0
A+B=15 —>A+15=B(plug this into the other equation)
60a+30b=600
60a+30(a+15)=600
60a+30a+150=600
90a+150=600
90a=450
A=5 (plug back in to first equation)
A+B=15
5+B=15
B=10

They have 5 of the Model A and 10 of model B.
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Step-by-step explanation:

A variable is a parameter that changes.

We have two types namely dependent and independent variables.

A dependent variable is a variable which its value needs to be determined based on the value of another variable while and independent variable is a variable which its value independent of other parameters.

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The volume of the tank V changes as time changes. So the volume of the tank V is dependent on time, t.  

So V is proportional to t

Since the volume of the tank is the variable that needs to be determined based on another variable-which is time,t- it is the dependent variable, while the time,t is the independent variable since its value is not determined based on other parameters.

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