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Svetach [21]
2 years ago
10

A heated piece of metal cools according to the function c(x) = (.5)x − 11, where x is measured in hours. A device is added that

aids in cooling according to the function h(x) = −x − 3. What will be the temperature of the metal after five hours? (1 point)
−8° Celsius
26° Celsius
32° Celsius
56° CelsiusWhat is the answer?
Mathematics
1 answer:
ruslelena [56]2 years ago
8 0
The answer is -8 degrees Celsius
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Victoria recently switched to a new electric company. If she uses between 0 and 400 kilowatt-hours (kWh) of electricity per mont
Gekata [30.6K]

Answer:

see the explanation

Step-by-step explanation:

<em><u>The question is </u></em>

Identify the domain and the range, using words and inequalities

Let

x -----> the number of kilowatt-hours (kWh) of electricity per month

y ----> the price per month

we know that

Part 1) For the value of x between 0 kWh and 400 kWh

0\ kWh \leq x < 400\ kWh

The price is equal to

y=\$30

therefore

The domain is the interval ------> [0,400)

The domain is all real numbers greater than or equal to 0 kWh  and less than 400 kWh

The range is ($30)

The range is equal to $30

Part 2) For the value of x equal to 400 kWh or more per month

x\geq 400\ kWh

The domain is the interval -----> [400, infinite)

The domain is all real numbers greater than or equal to 400 kWh

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y=0.097x

<em>Find the range</em>

For x=400 kWh

y=0.097(400)=\$38.8

so

y\geq \$38.8

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7 0
3 years ago
Bc has endpoints b(5 ,9) and c(-4, -3). Find the coordinates of the midpoint of bc
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<span>I hope this helps.</span>
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35 minutes for 5.25$


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2 years ago
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