When a window is open, the temperature in a room falls 5°F every 15 minutes. Before the window is opened, the temperature was 70
°F. Use the Ray tool to make a graph that shows the temperature of the room, T, after the window has been open for m minutes please hurry I will give you brainlest if you are correct and I need it graphed
2 answers:
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There are many ways to solve simultaneous linear equations. One of my favorite for finding integer solutions is graphing. The attached graph shows the solution to be ...
... (x, y) = (4, 7)
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You can also use Cramer's Rule, or the Vedic math variation of it, which tells you the solution to
is given by
Here, that means
... x = (9·67-5·75)/(9·8-5·3) = 228/57 = 4
... y = (75·8-67·3)/57 = 399/57 = 7
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A (graphing) calculator greatly facilitates either of these approaches.
