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Marta_Voda [28]

3 years ago

13

The temperature of a freezer started at 18ºC. After cooling for a few hours, the freezer had a temperature of –12ºC. What is the

difference between the new, colder temperature and the original temperature?

2 answers:

solong [7]3 years ago

7 0

Answer: -12-18

Step-by-step explanation:

kherson [118]3 years ago

3 0

Answer:

30

Step-by-step explanation:

-12 + 30 = 18

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At 2 hours before sunset, the temperature is 0°F. At 2 hours after sunset, the temperature is −4°F. Identify the equation repres

Yakvenalex [24]

For the given condition the equation represents the temperature y, in degrees Fahrenheit, at x hours after sunset will be y = -<u>4</u>x + <u>0.</u>

<h3>What is the equation?</h3>

An equation is a statement that two expressions, which include variables and/or numbers, are equal. In essence, equations are questions, and efforts to systematically find solutions to these questions have been the driving forces behind the creation of mathematics.

It is given that, at 2 hours before sunset, the temperature is 0°F. 2 hours after sunset, the temperature is −4°F and the equation representing the temperature y, in degrees Fahrenheit, at x hours after sunset.

The equation is obtained as,

y = -4x + 0.

Thus, for the given condition the equation represents the temperature y, in degrees Fahrenheit, at x hours after sunset will be y = -<u>4</u>x + <u>0.</u>

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7 0

1 year ago

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Diastolic blood pressures are assumed to follow a normal distribution with a mean of 85 and a standard deviation of 12. What pro

Bogdan [553]

Answer:

0.3745

Step-by-step explanation:

We have to solve the problem by calculating the z-score value that has the following formula:

z <(x - m) / sd

x is the value to evaluate (<80), m is the mean (85) and the standard deviation is sd (12)

replacing:

p (x <80) = z <(80 - 85) / 12

z <-0.416, we look for this value in the normal distribution table and it corresponds to:

p (x <80) = 0.3745

Which means that the proportion of people is 0.3745

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