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Tamara and Jason work at a widget factory. Tamara arrived at work before Jason and began making widgets. Tamara had already made 20 widgets when Jason began his work. Tamara was producing widgets at a rate of 8 widgets per hour. Jason was able to produce widgets at a rate of 12 widgets per hour. At some point, Tamara and Jason will have produced the same number of widgets.

Part A:
Write a system of equations to represent the situation. Let x = hours and y = widgets.

Part B:
How much time does it take for Tamara and Jason to produce the same number of widgets?

Part C:
How many widgets will Tamara and Jason have produced?

Sagot :

Answer:

To solve this problem we can construct an linear algebraic expression for each person, principally denoted as:

where

y :is our dependent variable (which is a function of )

x :is our independent variable

a :is the slope

c :is the y-intercept constant value (if any present)

Part A: Write a system of equations to represent the situation. Let x = hours and y = widgets.

Tamara

Has already made 20 widgets and produces at a rate of 8 widgets per hour thus here c=20 and a=8 , so Tamara's equation reads: yT=8x+20

Jason

Has not produced any widgets yet and produces at a rate of 12 widgets per hour thus here c=0 and a=12 , so Jason's equation reads:yj=12x

So the system of equations will be

yT=8x+20

yj=12x

Part B: How much time does it take for Tamara and Jason to produce the same number of widgets?

Since we want to find the amount of time (i.e. the value of x ) it takes for both of them to produce the same number of widgets we can just equate the two equations ans solve for x as follow:

yT=yj

8x+20=12x

8x-12x=-20

-4x=-20

x=5

So it takes them 5 hours to produce the same amount of widgets

Part C: How many widgets will Tamara and Jason have produced?

Now we can simply plug in the value of x=5 in any of the two equations (i.e. either for Tamara or Jason) to find the number of widgets produced.

yT=8(5)+20=40+20=60

So in a time-space of 5 hours Each will have produced 60 widgets and in total will be 60+60 = 120 widgets.

Step-by-step explanation:

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