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Oxana [17]
2 years ago
13

At 5:00 p.m., Antonio turned on the oven. While the oven preheated, the temperature in the oven increased from 72°F to 400°F ove

r a 10-minute period. The oven remained at 400°F for 45 minutes until Antonio turned it off. It took 60 minutes for the temperature in the oven to cool, returning to 72°F at 6:55 p.m. Which statement best explains whether or not the temperature in the oven is a function of the time?
A) It is a function because at any given time the oven was exactly one temperature.

B) It is a function because the oven temperature was the same at different times.

C) It is not a function because at any given time the oven was exactly one temperature.

D) It is not a function because the oven temperature was the same at different times.
Mathematics
2 answers:
lutik1710 [3]2 years ago
6 0

Answer:

option a

Step-by-step explanation:

Mandarinka [93]2 years ago
4 0

Option A

It is a function because at any given time the oven was exactly one temperature.

<em><u>Solution:</u></em>

Given that,

At 5:00 p.m., Antonio turned on the oven

While the oven preheated, the temperature in the oven increased from 72°F to 400°F over a 10-minute period

The oven remained at 400°F for 45 minutes until Antonio turned it off

It took 60 minutes for the temperature in the oven to cool, returning to 72°F at 6:55 p.m

From above information,

5:00  ------------ 72°F

5:10 ------------------ 400°F

5:45 ------------------ 400ºF

6:55 -------------------- 72°F

Thus at any given time (input) the oven was exactly one temperature  (a single output )

<em><u>Therefore the statement that best explains is:</u></em>

Option A) It is a function because at any given time the oven was exactly one temperature.

Since the definition of function states that there is a unique image corresponding to a element hence here the temperature at a given time is unique

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tatyana61 [14]

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2.\ f(x) = \frac{3}{4}x^2 + 2x - 5

Step-by-step explanation:

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f(x) = -8x^3 - 16x^2 - 4x\\f(x) = \frac{3}{4}x^2 + 2x - 5\\f(x) = \frac{4}{x^2} - \frac{2}{x} + 1\\f(x) = 0x^2 - 9x + 7

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Which of the above is a quadratic function

A quadratic function has the following form;

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So, to get a quadratic function from the list of given options, we simply perform a comparative test of each function with the form of a quadratic function

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This is not a quadratic function because it follows the form f(x) = ax^3 + bx^2 + c and this is different from ax^2 +bx + c = 0 \ where \ a\neq 0

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This function has an exact match with ax^2 +bx + c = 0 \ where \ a\neq 0

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4.\ f(x) = 0x^2 - 9x + 7

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dalvyx [7]

Answer:

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Step-by-step explanation:

* Lets explain how to solve this problem

- From the graph

# The graph intersects the x-axis at x = 1 and x = 9

∴ The x-intercepts are 1 and 9

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∴ x + 5 = -4 ⇒ subtract 5 from both sides

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∴ We can't solve this equation

# y = Ix - 5I - 4

∵ Ix - 5I - 4 = 0

- Add 4 to both sides

∴ Ix - 5I = 4

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∵ Ix - 5I = 4

∴ x - 5 = 4 ⇒ add 5 to both sides

∴ x = 9

- OR

∴ x - 5 = -4 ⇒ add 5 to both sides

∴ x = 1

∴ The x-intercepts are 1 and 9 the same with figure

* The function graphed is y = Ix - 5I - 4

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