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4 years ago

For what value of x is the rational expression below equal to zero? x-9/(x-4) (x+4)

Mathematics

2 answers:

IceJOKER [234]4 years ago

7 0

Answer:

The value of x is 9

Step-by-step explanation:

* It first we must to talk about the rational expression

- The rational expression is defined for all values of x except

the values make the denominator = zero

Ex: If the rational expression is a/b, then b ≠ 0 to be defined

* In any rational expression we must to avoid any values

make denominator = zero

* If we want to make rational expression equal to zero then we

must put the numerator equal to zero

* Now lets look to our problem

∵ The rational expression (x - 9)/(x - 4)(x + 4)

- To make this rational expression equal to zero, we must

equate the numerator by zero

∴ x - 9 = 0 ⇒ add 9 to both sides

∴ x = 9

* The value of x is 9

* Remember ⇒ x must not equal to 4 or -4 to avoid make

this rational expression undefined

soldier1979 [14.2K]4 years ago

4 0

Answer:

Yes it’s 9

Step-by-step explanation:

Apex: Rational Expressions

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Can someone please explain how to find x and y I don’t understand this at all

Katena32 [7]

To find y you must recognize that 141+3y=180 . You know this since half of a circle is 180, and a line is basically half a circle if you arc from end point to end point.

You can then subtract 141 from both sides,

3y = 39

Then divide both sides by 3,

y=13

You would want to use 39° for 3y° since 3·13= 39.

A triangle can only contain 180°, so you would add 68 and 39 together and then subtract this from 180 to give you x.

68 + 39 + x = 180

107 + x = 180

x = 73

3 0

3 years ago

Lainey bought a set of 15 makers for $6 what is the cost of 1 marker

neonofarm [45]

Answer:

Each marker costs $.40 or 40 cents

Step-by-step explanation:

Take the total cost and divide by the number of markers

$6.00 /15

.40

Each marker costs $.40 or 40 cents

7 0

4 years ago

Click the score on the graph where you think the balancing point would be for this data.

Ulleksa [173]

Answer:

The balancing point is 23

Step-by-step explanation:

Given

The above graph

Required

Determine the balancing point

This simply means that we calculate the mean.

From the above graph, we have:

$\begin{array}{cc}x & {f} & {21} & {3} & {22} & {5} & {28} & {1} & {29} & {1}\ \end{array}$

So, the mean is:

$\bar x = \frac{\sum fx}{\sum f}$

$\bar x = \frac{21*3+22*5+28*1+29*1}{3+5+1+1}$

$\bar x = \frac{230}{10}$

$\bar x = 23$

Hence, the balancing point is 23

3 0

3 years ago

Canceling units is also called: a. changing the value c. multiplication b. unit analysis d. making connections

SOVA2 [1]

Canceling units is also called unit analysis.

This is also called dimensional analysis.

What is a unit of analysis in statistics?

The unit of analysis is the entity that you're analyzing. It's called this because it's your analysis (what you want to examine) that determines what this unit is, rather than the data itself.
Because it is the analysis you do in your study that determines what the unit is.
For instance, if you are comparing the children in two classrooms on achievement test scores, the unit is the individual child because you have a score for each child.

For example -

1 ft = 12 in

3 ft = $3 ft * \frac{12 in }{1 ft}$

3 ft = ( 3 * 12 ) in ⇒ 36 in

Learn more about unit analysis

brainly.com/question/15579410

#SPJ4

3 0

2 years ago

Find the area of a horizontal cross section of a cylinder with a height of 11 meters and a circumference of about 81.64 meters.

iren2701 [21]

Answer:

Step-by-step explanation:
Hey
So we are given circumference as 81.681.64m
Formulae for circumference is 2 pi r
When you substitute 2(3.14)r= 81.64m
R = 13m
Area of the horizontal cross section is just the circle above the cylinder and the formulae is pi r^2
So it will be 3.14(13)^2
To give you 530.66m^2
Hope this helped

6 0

2 years ago