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Alexxx [7]
3 years ago
10

How to solve problems 43 and 45

Mathematics
1 answer:
Alona [7]3 years ago
4 0
43.= \frac{2x}{5x^2+ 12x{} -13} [/tex]
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Simplify 25^ - 1/2 <br><br>Please explain! I know the answer is 1/5 but why?
lisov135 [29]

(25)^{-\frac{1}{2} }

When the exponent is negative, you have to make the number a fraction(1 over the number).

For example:

25^{-2} = \frac{1}{25^{2} }

x^{-1} =\frac{1}{x^{1}  }

This gets rid of the negative, but it leaves the exponent

(25)^{-\frac{1}{2}}  = \frac{1}{25^{1/2}}

When an exponent is a fraction, it is the square root.

For example:

x^{\frac{1}{3}} =  \sqrt[3]{x}

x^{\frac{1}{2}}  =\sqrt{x}

x^{\frac{1}{4}}=\sqrt[4]{x}

So...

\frac{1}{25^{1/2}} = \frac{1}{\sqrt{25}  } = \frac{1}{5}

3 0
4 years ago
Can I get some help?
Step2247 [10]

Answer:

it's C

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Which numbers will produce a rational number when multiplied by 1/5
labwork [276]
A rational number times a rational number=rational numberan irrational number times a rational number=irrational number
remember, a rational number is a number that can be written as a/b where a and b are integers and b≠0


A is irrational because the pattern doesn't repeatb is irrational because it's a crazy square rootC is irrationalD is not irrational, it is a fraction 

answer is D

 
3 0
4 years ago
Did I correctly fill this out(20 points someone please answer)
Mamont248 [21]

Answer: yes

Step-by-step explanation:

7 0
3 years ago
What is the value of n?
morpeh [17]

Answer:

n = 28 degree

Step-by-step explanation:

2n + 17 + 2n - 5 + 2n = 180 degree (sum of interior angles of a triangle)

6n +12 = 180

6n = 180 - 12

n = 168/6

n = 28 degree

6 0
3 years ago
Read 2 more answers
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