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3 years ago

What’s a function in math

Mathematics

2 answers:

Norma-Jean [14]3 years ago

6 0

Answer:

A relation from a set of inputs to a set of possible outputs where each input is related to exactly one output

Step-by-step explanation:

Aleksandr-060686 [28]3 years ago

3 0

Answer:

See below.

Step-by-step explanation:

A function is a relation in which each input has only one output.

For example f(x) = 3x + 1 is a function. Whatever value of x you use the value of f(x) is only one value.

But the relation y = √x is not a function because for example if x = 4 then x = 2 or -2 - two outputs for the same input.

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Beth said the distance to school is 2.8 km. The actual distance is 3.5 km. What is the percent error

Rom4ik [11]

Answer:

20%

Step-by-step explanation: The percent of error formula is |(theoretical value-actual value)/actual value|=percent of error. Substitute the values in. |(2.8-3.5)/3.5|=|(-0.7)/3.5|=0.2. The percent equal to 0.2 is 20%.

3 0

3 years ago

Which equation represents "the product of a number and 24 is 72"?

maxonik [38]

Answer:

24p = 72

Step-by-step explanation:

The product refers to multiplication.

Let the number be p.

The product of p and 24 is 72.

24 × p = 72

24p = 72

7 0

3 years ago

Read 2 more answers

Answer the questions below about the quadratic function.f(x) = -2x² - 4x

Juli2301 [7.4K]

We are given the function below;

$f(x)=-2x^2-4x$

PART A

We then proceed to find if the function has a minimum or maximum value. To find if the function has a minimum or maximum value. If the x^2 coefficient is positive, the function has a minimum. If it is negative, the function has a maximum.

ANSWER: From the above, we can see that x^2 is negative, hence the function has a maximum

PART B and C

To find the minimum or maximum value, we would plot the graph of the f(x). The graph can be seen below.

From the graph, the black point helps answer part A and part B.

ANSWER: The function's maximum value is f(x)=2.

This is the point where the slope of the graph is equal to zero

ANSWER: The maximum value then occurs at x= -1

We can also solve this by differentiating the function.

$\begin{gathered} f(x)=-2x^2-4x \\ f^{\prime}(x)=-4x-4 \\ At\xi maxmum\text{ }f^{\prime}(x)=0 \\ -4x-4=0 \\ -4x=4 \\ x=-\frac{4}{4} \\ x=-1 \\ \therefore\text{The max}imum\text{ value occurs at x=-1} \\ \text{Inserting the value of x into the function, we have} \\ f(x)=-2(-1)^2-4(-1) \\ f(x)=-2+4 \\ f(x)=2 \\ \therefore\text{The function max}imum\text{ value is 2} \end{gathered}$

5 0

1 year ago

What is the circumference of the circle that

saul85 [17]

The answer is D 25 units

6 0

3 years ago

Work out the perimeter of this semicircle with radius 3cm. Give your answer in terms of π

kondaur [170]

Step-by-step explanation:

<u>Given </u><u>:</u><u>-</u><u> </u>

A semicircle is given with radius of 3cm .

And we need to find the perimeter of the semicircle . We know the perimeter as ,

$:\implies$ Perimeter = πr

$:\implies$ Perimeter = 3cm × π

$:\implies$ Perimeter = 3π cm .

Now there is the diameter of circle is 6cm . Hence totally the perimeter is ,

$:\implies$ Perimeter = 3π + 6 cm

We were supposed to give answers in terms of π .

<h3>Hence the perimeter is ( 3π + 6 ) cm</h3>

5 0

2 years ago