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Artyom0805 [142]
3 years ago
7

Please Help!!!!

Mathematics
1 answer:
alexira [117]3 years ago
5 0

The answer would be A and C.

Hope this helps!<3

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For the function f(x)=x+9/7-4x find f^-1(x)
Liula [17]

Answer:

Step-by-step explanation:

f(x)=\frac{x+9}{7-4x} \\put ~f(x)=y\\flip~x~and~y\\f(y)=x\\y=f^{-1}(x)\\y=\frac{x+9}{7-4x} \\flip~x~and~y\\x=\frac{y+9}{7-4y} \\x(7-4y)=y+9\\7x-4xy=y+9\\-4xy-y=9-7x\\or\\4xy+y=7x-9\\y(4x+1)=7x-9\\y=\frac{7x-9}{4x+1} \\or~f^{-1}(x)=\frac{7x-9}{4x+1}

3 0
3 years ago
Somebody please help me please please
Alina [70]
Y = -3x +2

i think this is the answer, i might be right, idk

Hope This Helps!!!
5 0
3 years ago
What is the answer to 3x = 6
lukranit [14]
6/3 = 2
3 x 2 = 6
3(2) = 6
x = 2
5 0
2 years ago
Read 2 more answers
In a group of 60 students, 20%are girls. How many are boys?
Firlakuza [10]

Answer: About 12 of those 60 students are boys.

To find the percent, you'll convert 20% to a decimal.

20 / 100 = 0.2

Then, multiply 60 by 0.2

0.2 × 20 = 12

That's one way, another way is:

Convert 20% to a fraction.

20% = 1/5

Then multiply 60 by 1/5.

60 × 1/5 = 60/5

Lastly, divide 60 by 5

60 / 5 = 12.

Hence, 12 is the answer.

<em>Any questions? Comment down.</em>

4 0
3 years ago
-5y-9 =-(-1)<br> A.- 1/2<br> B. -2 1/2<br> C. -2<br> D. -2/5
lbvjy [14]

Answer:

-5y=1+9

-5y=10

Y=-2

Your answer is C

3 0
3 years ago
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