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3 years ago

8

What is the difference between a function and not a function ALGEBRA

2 answers:

Schach [20]3 years ago

6 0

There are 3 main parts of a function no matter what : input "x" also known as the domain, then a "function" which changes each input into an unique output, f(x), the artist formally known as "y" the outputs creates a known set called "range"

Hope I helped :)

RideAnS [48]3 years ago

5 0

<span>A function is a relation between a set of inputs and a set outputs. They have to be related to each other...
For example
1, 2, 3, 4, 5
2, 4, 6, 8, 10
Those two are a function.
Hope this Helps!</span>

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For what values of the variables are the following expressions defined? 1. 5y+2 2. 18/y 3. 1/x+7 4. 2b/10−b Example: X>7

Serga [27]

Answer:

1. All real numbers

2. All real numbers except y = 0

3. All real numbers except x = -7

4. All real numbers except b = 10

Step-by-step explanation:

For any function to be defined at a particular value, it should not be <em>approaching to a value </em> $\infty$ <em> or it should not give us the </em> $\frac{0}{0}$ <em> (zero by zero) form </em> when the input is given to the function.

The value of function will depend on the denominator.

Now, let us consider the given functions one by one:

1. 5y+2

Here denominator is 1. So, it can not attain a value $\infty$ or $\frac{0}{0}$ <em> (zero by zero) form </em>

So, for all real numbers, the function is defined.

$2.\ \dfrac{18}{y}$

At y = 0, the value

$At\ y =0, \dfrac{18}{y} \rightarrow \infty$

So, the given function is <em>defined for all real numbers except y = 0</em>

<em></em>

<em></em> $3.\ \dfrac{1}{x+7}$ <em></em>

Let us consider denominator:

x + 7 can be zero at a value x = -7

$At\ x =-7, \dfrac{1}{x+7} \rightarrow \infty$

So, the given function is <em>defined for all real numbers except x = -7</em>

<em></em>

$4.\ \dfrac{2b}{10-b}$

Let us consider denominator:

10-b can be zero at a value b = 10

$At\ b =10, \dfrac{2b}{10-b} \rightarrow \infty$

So, the given function is <em>defined for all real numbers except b = 10</em>

<em></em>

7 0

3 years ago

A ball is dropped from a height of 180 meters. The height of the ball can be represented by

Alex Ar [27]

I think it is C but it also could be B as well

6 0

3 years ago

Just need the answers to see if im right lol

denis-greek [22]

Answer:

what is the question ? Volume or surface area???

6 0

3 years ago

Paula wants to save at least $800 for a trip. Which inequality shows the least amount she must save each month for 9 months to a

ElenaW [278]

Answer:

C

Step-by-step explanation:

7 0

2 years ago

What survival rate in the 10th year would make the average rate of loss over the 10-year period equal to 38.0%?

Morgarella [4.7K]

Answer: 63%

Step-by-step explanation:

First find the rate of loss that would cause the average rate of loss over the 10-year period equal to 38.0%.

Assume that rate is x.

38 = (36.2 + 29.0 + 46.2 + 37.5 + 40.9 + 40.0 + 32.6 + 40.5 + 40.1 + x) / 10

38 = (343 + x ) / 10

380 = 343 + x

x = 380 - 343

x = 37%

The survival rate is the opposite of the rate of loss which means that the survival rate is;

= 1 - rate of loss

= 1 - 37%

= 63%

7 0

2 years ago