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xxTIMURxx [149]
4 years ago
13

What is the sum?

exFormula1" title=" \frac{3}{x^-9} + \frac{5}{x+3} " alt=" \frac{3}{x^-9} + \frac{5}{x+3} " align="absmiddle" class="latex-formula">
Mathematics
1 answer:
olchik [2.2K]4 years ago
4 0
Make denomenators the same

times left denomenator by (x+3)/(x+3) and right one by (x-9)/(x-9)

\frac{3(x+3)}{(x-9)(x+3)}+  \frac{5(x-9)}{(x-9)(x+3)}=
\frac{3(x+3)+5(x-9)}{(x-9)(x+3)}=
\frac{3x+9+5x-45}{(x-9)(x+3)}=
\frac{8x-36}{(x-9)(x+3)}

if expandded we get
\frac{8x-36}{x^2-6x-27}
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In Nebraska, Mr. Dukarelli's 11th grade class consisting of 27 students was surveyed and 34.6 percent of the students reported t
postnew [5]

95141 1404 393

Answer:

  b.  28,300

Step-by-step explanation:

The estimated number of 11th grade students in the state is ...

  (1600 classes)(27 students/class) = 43,200

About 34.6% are estimated to have 2 or more siblings, so the remaining 100%-34.6% = 65.4% are estimated to have fewer than 2 siblings.

Translated to a number of students, that percentage is ...

  0.654 × 43,200 = 28,252.8 ≈ 28,300

A good estimate of the number of students with fewer than 2 siblings is 28,300.

8 0
3 years ago
The value of a car decreases about 7% percent each year after it is manufactured.The 2017 Honda Civic costs $19,540
Kitty [74]

Answer: a) , where 'A' is the value of car after 't' years.


b) $12446.784



Step-by-step explanation:


Given: A new car that sells for $21,000 depreciates (decreases in value) 16% each year.


Then a function that models the value of the car will be


, where 'P' is the selling price of car, 'r' is the rate of depreciation in decimal, 't' is the time in years and 'A' is the value of car after 't' years.


Thus after substituting given value, the function becomes




To find the value after 3 years, substitute t=3 in the above function.




Hence the value of car after 3 years=$12446.784



5 0
3 years ago
The function f(x) = ( )* is translated up 4 units. Which equation represents the translated function?
kupik [55]

Answer:

c

Step-by-step explanation:

7 0
3 years ago
In blueprints an architects firm drew everything 1/24 of the actual size the windows will actually measure 4feet by 6 feet and t
stich3 [128]
To apply a scale to a measure, you have to follow this rule:

Real measure x Scale = Scaled measure

So the drawings will have:

4 x 1/24 = 0'167 feet
6 x 1/24 = 0'25 feet
<span>Windows: 0'167 by 0'25 feet
</span>
<span>12 x 1/24 = 0'50 feet
</span><span>8 x 1/24 = 0'33 feet
</span>Doors: 0'33 by <span>0'50 feet</span>
8 0
4 years ago
Read 2 more answers
Brainly? I’ll give it !
erica [24]

Answer: 29 in

Step-by-step explanation:

8 0
3 years ago
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