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Mandarinka [93]
3 years ago
12

What is the sum? StartFraction 3 Over x squared minus 9 EndFraction + StartFraction 5 Over x + 3 EndFraction

Mathematics
2 answers:
Karolina [17]3 years ago
8 0

Answer:

The answer is:

\frac{5 x - 12}{(x + 3)(x - 3)}

Step-by-step explanation:

\frac{3}{x ^{2}  - 9}  +  \frac{5}{x + 3}

First, we have to make the denorminator same by multiplying:

\frac{3}{(x + 3)(x - 3)}  +  \frac{5}{x + 3}

\frac{3}{(x + 3)(x - 3)}  +  \frac{5(x - 3)}{(x + 3)(x - 3)}

Then, we can add up everything together:

\frac{3 + 5x - 15}{(x + 3(x - 3)}

\frac{5x - 12}{(x + 3)(x - 3)}

(Sorry if being messy)

Fed [463]3 years ago
5 0

Answer:

Its D on egedenuity

Step-by-step explanation:

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Solve the system of linear equations below.
sergiy2304 [10]

Answer:

Step-by-step explanation:

Let's use the addition/elimination method to solve this.  If we multiply the first equation through by -1 we can eliminate the x terms.  Doing that gives us:

 -x  +  3y  =  3

  x  +  3y  =  9

The x's subtract each other away leaving us with

6y = 12 so

y = 2.

Now we will plug in 2 for y in either of the original equations to solve for x:

x + 3(2) = 9 and

x + 6 = 9 so

x = 3

The coordinate for the solution is (3, 2) or x = 3, y = 2

The second choice down is the one you want.

6 0
3 years ago
Beatrice graphed the relationship between the time (in seconds) since she sent a print job to the printer and the number of page
xxTIMURxx [149]

Given:

Consider the below figure attached with this question.

To find:

The interpretation for x-intercept in this context.

Solution:

In the given graph x-axis represents the second since sending print job and y-axis represents the Pages printed.

At x-axis the y-coordinate is 0. It means the x-axis represents the number of seconds that passed before the printer started printing pages.

Therefore, the correct option is C.

4 0
3 years ago
2/3x=10 thankyou for helping me
Novay_Z [31]
(2/3)x = 10
(3/2)(2/3)x = 10(3/2)
x = 30/2 = 15
6 0
3 years ago
Read 2 more answers
If one side of a cube is 15m in length,find its volume
sergeinik [125]

Answer:

V = 3375~m^{3}

Step-by-step explanation:

The formula of the volume of a cube is V = a^{3} where "a" would correspond to the length of an edge/side/height/etc.

If we insert our value into the formula, we get the following result:

V = a^{3}

V = 15m^{3}

V = 3375~m^{3}~(cubic~meters)

Hope it helped,

BiologiaMagister

5 0
4 years ago
Read 2 more answers
In the expansion of
Mumz [18]

By the binomial theorem, the x^2 term in the expansion of \left(1-\frac x4\right)^n is

\dbinom n21^{n-2}\left(-\dfracx4\right)^2=\dfrac{n!}{2!(n-2)!}\dfrac{x^2}{16}

which suggests that the contribution of the binomial coefficient should make up the remaining factor of 21. That is,

\dfrac{n!}{2!(n-2)!}=\dfrac{n(n-1)}2=21\implies n=7

5 0
3 years ago
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