52 = 1/2* (190 - 2x)

Mathematics

1 answer:

Degger [83]3 years ago

6 0

Are these two seperate equations or the same one???

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The ABCD Electronics Company has just manufactured 7000 write-rewrite CDs, and 160 are defective. If 5 of these CDs are randomly

Kamila [148]

First, we must find what percent of 7,000 is 160.

To do this, let's do 160/7,000

160/7000 simplified is 4/75.

So, 4 out of every 75 CDs will be defective. If we want to find the probability of them all being affective, we must first do 71/75, because we subtracted the amount of defective CDs from the numerator.

Next week must multiply 71/75*71/75*71/75*71/75*71/75 to get the probability of 5 randomly selected ones being affective.

I got 1804229351/2373046875

If you divide this, you get 0.76030076354, so there is about a 76 percent chance of having all 5 randomly pulled be affective.

.Hope this helped! Comment if you have any questions!!!

4 0

3 years ago

Differentiate <br> 1/√x^2-1

xz_007 [3.2K]

The function is $f(x)= \frac{1}{ \sqrt{ x^{2} -1}}$

write f again as $f(x)= (x^{2} -1)^{- \frac{1}{2} }$

(the power -1 takes the expression to the denominator, and the power 1/2 is square root)

writing rational expressions as power expressions, generally makes differentiation more practical.

In $f(x)= (x^{2} -1)^{- \frac{1}{2} }$ we notice 2 functions:

the outer function $u^{ -\frac{1}{2} }$ , where $u=x^{2} -1$ , and the inner, u itself , which is a function of x.

So we differentiate by using the chain rule:

$f'(x)= -\frac{1}{2}u^{- \frac{1}{2}-1 }*u'= -\frac{1}{2}u^{- \frac{3}{2} }*(2x)=- \frac{x}{ \sqrt{ u^{3} } } =- \frac{x}{ \sqrt{ (x^{2} -1)^{3} } }$

Answer: $- \frac{x}{ \sqrt{ (x^{2} -1)^{3} } }$

3 0

3 years ago

The sum of twice a number and 5 less than the number is the same as the difference between-17 and the number. What is the number

aksik [14]

equation- 2x+x-5= x--17

minus negative which is the same as adding the opposite so +17

4 0

3 years ago

Sin C = .9513 find the measure of angle c to the nearest whole degree

BARSIC [14]

Answer:

72º

Step-by-step explanation:

C = arcsin .9513

C = 72.045199929442813

C = 72º

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3 years ago

When a figure is dilated what type of figure is created

garik1379 [7]

Dilation- A figure that grows or shrinks but still maintains its very shape.

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3 years ago