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Tom [10]
3 years ago
10

andrew made a scale drawing of the elementary school. The scale of the drawing was 8 centimeters : 3 meters. if the actual lengt

h of the schoolyard is 30 meters, How long is the schoolyard in the drawing ?how long is the schoolyard in the drawing
Mathematics
1 answer:
Schach [20]3 years ago
4 0

Answer:i think its 80 cm

Step-by-step explanation:

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12 minutes to drive 30 laps; 48 minutes to drive 120 laps
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Angelina_Jolie [31]
Okay so to represent juice we are going to use X, and to represent water we are going to use Y.

We also know that the first two starting equations are:

6x + y = 135

4x + 2y = 110

We can re-arrange the first equation so that it equals y (for now), so it is going to end up looking like this:

y = -6x +135

Now you can take that equation and plug into either one of the starting two equations.  I chose the second equation.  We just substitute what y equals in for y in the equation, so we have:

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Now solve

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Subtract 270 from both sides

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Now divide by -8 on both sides

x = 20

We can now confirm that juice costs $20

Now lets plug that into the equation where we solved for y, to get the actual value of y.

y = 135 - 6(20)

y = 135 - 120

y = 15

The price of water costs $15

From this we can conclude that the cost of juice is $20 and the price of water is $15

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Answer:

Step-by-step explanation:

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