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4 years ago

40 POINTS NEED HELP FAST(sqrt is a radical)

Mathematics

1 answer:

Ira Lisetskai [31]4 years ago

4 0

1)5sqrt17,2sqrt157,8sqrt2

2)sqrt7

3)-3(3sqrt3+2sqrt5)

4)18sqrt6,12sqrt3-9sqrt15

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Solve the following equation. Remember to check for extraneous solutions 7/(b+3) + 5/(b-3) = (10b-2)/(b²-9).

vlabodo [156]

Answer:

b= 2 is the solution for the given equation.

Step-by-step explanation:

Here, the given expression is:

$\frac{7}{(b+3)} + \frac{5}{(b-3)} = \frac{10b -2}{(b^{2} -9)}$

Simplifying Left side, we get

$\frac{7}{(b+3)} + \frac{5}{(b-3)}$

= $\frac{7(b-3) + 5(b+3)}{(b+3)(b-3)}$

Also, by ALGEBARIC IDENTITY: $x^{2} -y^{2} = (x+y)(x-y)$

So, $(b+3)(b-3) = b^{2} -9$

So, LHS becomes $\frac{7(b-3) + 5(b+3)}{b^{2} -9}$

Compare both Left side, Right side we get

$\frac{7(b-3) + 5(b+3)}{b^{2} -9}$ = $\frac{10b -2}{(b^{2} -9)}$

or, 7(b-3) + 5(b+3) = 10b -2

⇒ 7b - 21 + 5b + 15 = 10b -2

or, 12b - 10b = 6-2

or, 2b = 4 ⇒ b = 4/2 = 2

⇒ b= 2 is the solution for the given equation.

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4 years ago

Pls solve ty if u do!! :)

andrey2020 [161]

Answer:

at least 30

Step-by-step explanation:

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3 years ago

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A petting zoo has 5 goats, 8 sheep, and 12 rabbits. What is the ratio of rabbits to total animals?

lidiya [134]

Answer:

The answer is C. Hope this helps!

Step-by-step explanation

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3 years ago

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How do I do this equation: 2/3x+9/2=1/3

Softa [21]

Answer:

-6.25

Step-by-step explanation:

1/3-9/2=-25/6

-25/6 divide 2/3 =-6.25

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3 years ago

Which answer is correct

Drupady [299]

Hi honey, are you still working on this problem? if so check your messages i’ve sent the answer there because for some reason my messages aren’t showing

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3 years ago