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anzhelika [568]
3 years ago
14

If K = (AB)/(A+B) , then B = ?

Mathematics
1 answer:
marysya [2.9K]3 years ago
6 0

Lets do

\\ \sf\longmapsto K=\dfrac{AB}{A+B}

\\ \sf\longmapsto \dfrac{1}{K}=\dfrac{A+B}{AB}

\\ \sf\longmapsto \dfrac{1}{K}=\dfrac{1}{A}+\dfrac{1}{B}

\\ \sf\longmapsto \dfrac{1}{B}=\dfrac{1}{K}-\dfrac{1}{A}

\\ \sf\longmapsto \dfrac{1}{B}=\dfrac{K-A}{AK}

\\ \sf\longmapsto B=\dfrac{AK}{K-A}

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astraxan [27]

Answer:

x = m - z

Step-by-step explanation:

z = m - x

Add x to both sides.

x + z = m

Subtract z from both sides.

x = m - z

8 0
3 years ago
Find (F/g)(x)<br> F(x) = sqrt x^2-1<br> g(x) sqrt x-1
Margaret [11]

Answer:

Option A. √(x + 1)

Step-by-step explanation:

Data obtained from the question include:

f(x) = √(x² – 1)

g(x) = √(x – 1)

(f/g) (x) =..?

(x² – 1) => difference of two square

(x² – 1) => (x – 1)(x + 1)

f(x) = √(x² – 1)

f(x) = √(x – 1)(x + 1)

(f/g) (x) = f(x) /g(x)

f(x) = √(x – 1)(x + 1)

g(x) = √(x – 1)

(f/g) (x) = √(x – 1)(x + 1) / √(x – 1)

(f/g) (x) = √[(x – 1)(x + 1) / (x – 1)]

(f/g) (x) = √(x + 1)

7 0
3 years ago
How many 30 are there in 600
strojnjashka [21]
The question that is asked is pretty straight forward. Only thing that needs to be found is the number of 30 in the number 600. By dividing 600 by 30 we can arrive at the desired result.
Number of 30 in 600 = 600/30
                                 = 60/3
                                 = 20
So there are 20 number of 30s in the number 600. This method can be used to find answers to several other similar kind of questions like the number of 10s in 1000.Following the same procedure we get
Number of 10 in 1000 = 1000/10
                                   = 100
5 0
3 years ago
Read 2 more answers
Can someone please answer this question please help please answer it correctly and please show work please help I need it please
mr_godi [17]

Answer:

Step-by-step explanation:

24)

200= 3(21) + 4x

200= 63 +4x

-63   -63

137= 4x

divide each side by 4

34 = x

c

25)

.5(pi)= about 1.6

1.6(2.5)= 4

c

44)

equation-     T= 12.17+0.75v

105.75= 12.17 + .75v

-12.17    -12.17

93.58= .75v

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3 0
3 years ago
Read 2 more answers
Answer with workings please
icang [17]
AB = 9 cm
BC = 6cm

CD = 7 cm
AE = 6 cm

3BC = AB
3ED = AE

  AB = AE
  BC    ED
    ⁹/₃ = ⁶/ₓ
3 · 6 = 9 · x
   18 = 9x
    9      9
     2 = x

ED = 2 cm
5 0
3 years ago
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