3 years ago

Please help me ❤️ thanks

1 answer:

6 0

The answer should be D.
It says, when the room is cooler than 68°F, the heater would turn on. In those 4 thermometers, only D has a temperature of lower than 68 °F.

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Answer:

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Step-by-step explanation:

Suppose, the first side is a, the second side is b, and the third side is c. So:

→ a = s - 4

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→ c = (s - 4) + 3

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First step, find the value of s

a + b + c = 15

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$s = \frac{20}{3}$

So, the third side is

c = (s - 3) + 4

c = s + 1

c = $\frac{20}{3} + 1$

$c = \frac{23}{3}$

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