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attashe74 [19]
2 years ago
11

Two numbers have a sum of 4, and the sum of their reciprocals is 8.

Mathematics
1 answer:
Leno4ka [110]2 years ago
6 0

Answer:

Can you explain better?

Step-by-step explanation:

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zimovet [89]
Answer:
First choice is the correct one

Explanation:
The given is:
[(x+5) / (x+2)] - [(x+1) / x(x+2)]
First, we will need to have a common denominator and then we will solve the subtraction normally. To get a common denominator, we will have to multiply both numerator and denominator of first term by x.

Therefore:
[(x+5) / (x+2)] - [(x+1) / x(x+2)] = [x(x+5) / x(x+2)] - [(x+1) / x(x+2)]
                                                 = [x(x+5)-(x+1)] / [x(x+2)]
                                                 = (x^2 + 5x - x - 1) / [x(x+2)]
                                                 = [(x^2 + 4x - 1)] / [x(x+2)]

Hope this helps :)

3 0
3 years ago
True or false: for any function, x=f^-1(y), then y=f(x)
kozerog [31]

YES

We can work out the inverse using Algebra. Put "y" for "f(x)" and solve for x:

<span><span>The function: f(x)=2x+3
</span><span>Put "y" for "f(x)": y=2x+3
</span><span>Subtract 3 from both sides:
 y-3=2x
</span><span>Divide both sides by 2:
 (y-3)/2=x
</span><span>Swap sides: x=(y-3)/2</span><span>  
   </span><span><span>Solution (put "f-1(y)" for "x") :</span> <span>f-1(y)</span>=(y-3)/2</span></span>


6 0
3 years ago
Read 2 more answers
Emery is depositing checks of $86.09, $311.53, and $12.62 into his checking account, and he wants to receive $225.00 cash back.
SpyIntel [72]
Your answer would be 185.24 due to cash back subtracting from deposits for the total on the green line
5 0
3 years ago
Read 2 more answers
If 2x - 5 = 11. what is 3x?
Anna71 [15]

Answer:

24

Step-by-step explanation:

add 5 to both sides to get 2x=16

divide both sides by 2

x=8

3(8)=24

4 0
3 years ago
Read 2 more answers
How many solutions does the following absolute value equation have? |x+3|=4
bekas [8.4K]
It has two solutions.
The first solution is x = -7
The second solution is x = 1

Hope this helps!
3 0
3 years ago
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