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Dmitrij [34]
2 years ago
13

Y is directly proportional to x2. If y = 112 when x = 4 find y when x = 9 y=

Mathematics
1 answer:
elena-s [515]2 years ago
7 0

Answer:

112-4

y-9

4y=112*9

4y=1008

y=1008/4

y=252

have a nice day .

hope this helps

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Can you please help me with this i don’t understand
Alinara [238K]

Answer:

  (5, 2)

Step-by-step explanation:

<h3>understanding the question</h3>

The question is asking you to express the temperature at 5 pm as a pair of graph coordinates.

Doing this requires that you ...

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  • read from the graph the temperature at 8 pm
  • figure the temperature halfway between those values
  • express the 5 pm temperature as an ordered pair (hours, °C)

__

<h3>reading the graph</h3>

The description of the graph tells you the horizontal scale is hours after noon, so the temperature at 2 pm will be a point on the graph with an x-coordinate of 2. That point is (2, 7), indicating the temperature at 2 pm is 7 °C.

Likewise, the temperature at 8 pm is shown as the point on the graph with x-coordinate 8. That point is (8, -3), indicating a temperature of -3°C at 8 pm.

<h3>halfway temperature</h3>

The temperature halfway between those values (7 °C and -3 °C) can be found several ways. Perhaps the easiest is to average the values:

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The temperature at 5 pm is 2 °C.

<h3>coordinates</h3>

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The coordinates that represent the temperature at 5 pm are ...

  (5, 2)

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